Subject: cultivars and Glycine max - PubAg Search Results

1. The percentage of nitrogen in different parts of soybean plants at different stages of growth

Author:: Erdman, L.W.
Source:: Agronomy journal 1929 v.21 no.3 pp. 361-366
ISSN:: 0002-1962
Subject:: Glycine max; developmental stages; nitrogen content; cultivars; genetic variation; chemical constituents of plants
Abstract:: ... Samples of inoculated soybeans from four varieties grown on Carrington loam under field conditions were collected at various stages of growth. They were divided into tops; roots, and nodules and analyzed for total nitrogen. From this study the following conclusions may be drawn: 1. When seed varieties are cut for hay they contain a higher percentage of nitrogen in their nodules than the regular ha ...
DOI:: 10.2134/agronj1929.00021962002100030010x
: https://doi.org/10.2134/agronj1929.00021962002100030010x

2. Inheritance of resistance of soybeans to Peronospora manshurica

Author:: Geeseman, G.E.
Source:: Agronomy journal 1950 v.42 no.12 pp. 608-613
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; strains; genetic resistance; mildews; inheritance (genetics)
Abstract:: ... This investigation was conducted under greenhouse conditions to determine the mode of inheritance of factors for reaction of soybeans to three physiologic races of downy mildew, Peronospora manshurica (Naoum.) Syd. The F2 and F3 reactions of susceptible X resistant crosses to races 1 and 2 indicated that in each cross studied one pair of factors, giving a 3:1 ratio, governed resistance. Resistance ...
DOI:: 10.2134/agronj1950.00021962004200120007x
: https://doi.org/10.2134/agronj1950.00021962004200120007x

3. Physiologic races of Peronospora manshurica on soybeans

Author:: Geeseman, G.E.
Source:: Agronomy journal 1950 v.42 no.5 pp. 257-258
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; pathotypes; plant pathogenic fungi; mildews; disease prevalence; fungal diseases of plants
DOI:: 10.2134/agronj1950.00021962004200050011x
: https://doi.org/10.2134/agronj1950.00021962004200050011x

4. Resistance in Soybeans, Glycine Max L,. Merr., to the Reniform Nematode

Author:: R. V. Revois; Wiley C. Johnson; Eldon J. Cairms
Source:: Crop science 1968 v.8 no.3 pp. 394-395
ISSN:: 0011-183X
Subject:: Glycine max; Heterodera glycines; Meloidogyne; Rotylenchulus reniformis; cultivars; soil; soybeans
Abstract:: ... Of eight soybean cultivars tested ‘Pickett’ and ‘Dyer’, were found to be resistant to the reinform nematode, Rotylenchulus reniformis. In the presence of Pickett and Dyer, the soil counts of renifonni nematodes were significantly reduced from an initial 10,000 larvae to less than 500 per pot over a 2.5-month period. Cultivars resistant to the root knot, Meloidogyne spp., did not possess resistance ...
DOI:: 10.2135/cropsci1968.0011183X000800030041x
: https://doi.org/10.2135/cropsci1968.0011183X000800030041x

5. Soybean Cultivars: Acute Foliar Response to Ozone

Author:: David T. Tingey; Richard A. Reinert; Hershell B. Carter
Source:: Crop science 1972 v.12 no.3 pp. 268-270
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; necrosis; ozone; soybeans
Abstract:: ... Fourteen cultivars of soybean [Glycine max (L.) Merr.] from maturity groups 0 through VI were exposed to 30 and 70 pphm ozone for 1.5 hours to determine differences in cultivar sensitivity. Cultivar ‘Hark’ was the most susceptible, whereas ‘Hood’ was the most tolerant to ozone injury. ‘Hawkeye’ was the most sensitive cultivar at 70 pphm and among the least sensitive at 30 pphm, whereas ‘Chippewa 6 ...
DOI:: 10.2135/cropsci1972.0011183X001200030003x
: https://doi.org/10.2135/cropsci1972.0011183X001200030003x

6. Effect of Multiple Applications of 2,3,5-Triiodobenzoic Acid (TIBA) on Yields of Stormproof and Nonstormproof Cotton

Author:: A. H. Freytag; E. A. Coleman
Source:: Agronomy journal 1973 v.65 no.4 pp. 610-612
ISSN:: 0002-1962
Subject:: Glycine max; Gossypium hirsutum; benzoic acids; buds; crop yield; crops; cultivars; dwarfing; epinasty; flowering; flowers; foliar application; fruiting; leaves; pods; seed cotton; soybeans
Abstract:: ... Field grown upland cotton (Gossypium hisutum L.) usually matures approximately 30 to 40% of the flowers that reach anthesis. Several investigators have shown 2,3,5-triiodobenzoic acid (TIBA) to be successful in causing the retention of buds, blooms and pods of soybeans (Glycine max (L.) Merr.) Virtually no results have been reported on the use of TIBA to retain the 30 to 40% flower shed that occur ...
DOI:: 10.2134/agronj1973.00021962006500040024x
: https://doi.org/10.2134/agronj1973.00021962006500040024x

7. Effect of Seed Maturation and Plant Population on Soybean Seed Quality

Author:: J. S. Burris
Source:: Agronomy journal 1973 v.65 no.3 pp. 440-441
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; defoliation; flowering; flowers; pods; root growth; roots; seed germination; seed maturation; seed quality; seed size; shoots; soybeans
Abstract:: ... Soybean (Glycine max (L.) Merr.) seed producers have shown a renewed interest in the premature defoliation of seed fields to facilitate earlier dry-down and efficient harvest. This interest prompted this study on the effects of seed maturation (days after flowering) on seed quality. Four cultivars of soybeans were grown at 4 and 8 plants/ 30 cm rows in rows 75 cm apart. Individual flower nodes wer ...
DOI:: 10.2134/agronj1973.00021962006500030025x
: https://doi.org/10.2134/agronj1973.00021962006500030025x

8. The Effects of Herbicides on Soybean Seed Constituents

Author:: E. W. Stoller; E. J. Weber; L. M. Wax
Source:: Journal of environmental quality 1973 v.2 no.2 pp. 241-244
ISSN:: 0047-2425
Subject:: Glycine max; cultivars; fatty acid composition; herbicides; nonprotein nitrogen; oils; seed yield; soybeans; weeds; Illinois
Abstract:: ... The effects of 24 herbicides on soybean [Glycine max (L.) Merr.] seed yield, weight, protein, nonprotein nitrogen, oil, and fatty acid composition were investigated for several cultivars in 1969, 1970, and 1971 at Urbana, Illinois. Significant, but very small alterations in the measured parameters were noted for some herbicides, applied alone or in combination. The greatest difference observed was ...
DOI:: 10.2134/jeq1973.00472425000200020015x
: https://doi.org/10.2134/jeq1973.00472425000200020015x

9. Evaluation of Intergenotypic Competition with a Paired-Row Technique

Author:: W. R. Fehr
Source:: Crop science 1973 v.13 no.5 pp. 572-575
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; soybeans; yields; Iowa
Abstract:: ... A paired-row technique was developed to measure intergenotypic competition between soybean (Glycine max (L.) Merr.) cultivars. A paired-row plot consisted of two rows spaced 8 cm apart, the closest that we were able to grow soybeans in Iowa and still distinguish the individual rows at harvest. Different paired-row plots were grown 1 m apart. To evaluate the competitive interaction of two soybean c ...
DOI:: 10.2135/cropsci1973.0011183X001300050024x
: https://doi.org/10.2135/cropsci1973.0011183X001300050024x

10. Forage Potential of Soybean Straw

Author:: B. S. Gupta; D. E. Johnson; F. C. Hinds; H. C. Minor
Source:: Agronomy journal 1973 v.65 no.4 pp. 538-541
ISSN:: 0002-1962
Subject:: Glycine max; acid detergent fiber; acreage; body weight; cell wall components; cellulose; chemical analysis; crude protein; cultivars; developing countries; diet; digestibility; ewes; flowering; forage yield; greenhouses; hemicellulose; lignin; minerals; nutritive value; pods; soybean meal; soybeans; stems; straw; United States
Abstract:: ... The nutritive value of soybean [Glycine max (L.) Merrill] straw was studied because of the vast acreage grown in the U.S. and the marked expansion scheduled for this crop in developing countries. Nutritive value was estimated on greenhouse and field-grown plants and plant parts at various stages of maturity by using standard techniques of forage chemical analysis, in vitro dry matter disappearance ...
DOI:: 10.2134/agronj1973.00021962006500040004x
: https://doi.org/10.2134/agronj1973.00021962006500040004x

11. Interaction of Selected Pesticides and Rhizobium japonicum in Pure Culture and Under Field Conditions

Author:: George Kapusta; D. L. Rouwenhorts
Source:: Agronomy journal 1973 v.65 no.1 pp. 112-115
ISSN:: 0002-1962
Subject:: Bradyrhizobium japonicum; Glycine max; antibacterial properties; carbaryl; chlorpropham; cultivars; disulfoton; growth retardation; most probable number technique; nitralin; nodulation; pesticide application; seed yield; soil; soil sampling; soybeans
Abstract:: ... Investigations were conducted to determine the influence of selected pesticides on the growth of Rhizobium japonicum Kirch. Buch. in pure culture and in soil. In addition, nodulation and seed yield of inoculated soybeans [Glycine max (L.) Merr. cultivar ‘Wayne’] were studied under field conditions. Commercial formulations of 24 pesticides were screened for bacteriostatic activity on rhizobia using ...
DOI:: 10.2134/agronj1973.00021962006500010034x
: https://doi.org/10.2134/agronj1973.00021962006500010034x

12. Effect of Planted Seed Size on Emergence and Yield of Soybeans (Glycine Max (L.) Merr.)

Author:: D. R. Johnson; V. D. Luedders
Source:: Agronomy journal 1974 v.66 no.1 pp. 117-118
ISSN:: 0002-1962
Subject:: Glycine max; crop yield; cultivars; seed size; soybeans
Abstract:: ... The effect of planted seed size on emergence and yield was evaluated in the field with four soybean (Gly-cine max (L.) Merr.) cultivars (‘Amsoy 71’, ‘Beeson,’ ‘Calland,’ and ‘Clark 63’) in 1971 and 1972. Seed from each cultivar was divided into three sizes. These plus a mixture of all three seed sizes were tested. Seed sizes varied from 130 to 250 mg/seed and had no effect on emergence or yield. T ...
DOI:: 10.2134/agronj1974.00021962006600010035x
: https://doi.org/10.2134/agronj1974.00021962006600010035x

13. Influence of Between and Within-Row Spacing on Agronomic Characteristics of Irrigated Soybeans

Author:: B. Basnet; E. L. Mader; C. D. Nickell
Source:: Agronomy journal 1974 v.66 no.5 pp. 657-659
ISSN:: 0002-1962
Subject:: Glycine max; agronomic traits; cultivars; irrigation; plant density; pods; row spacing; seed weight; seeds; soybeans
Abstract:: ... Several workers have reported on the effect of varying between and within-row spacing on soybean (Glycine max (L.) Merr.) yield but few have used irrigated soybeans. We studied two row-widths, and two in-row spacings in a split-split plot arrangement in 1969 and 1970 using five soybean cultivars on irrigated plots. Plants in '46-cm row width or 3.8-cm within-row spacing were taller, lodged more, a ...
DOI:: 10.2134/agronj1974.00021962006600050016x
: https://doi.org/10.2134/agronj1974.00021962006600050016x

14. Nitrate Uptake Effectiveness of Four Plant Species

Author:: D. D. Warncke; S. A. Barber
Source:: Journal of environmental quality 1974 v.3 no.1 pp. 28-30
ISSN:: 0047-2425
Subject:: Bromus inermis; Glycine max; Sorghum bicolor; Zea mays; corn; cultivars; forage; grain sorghum; nitrates; nutrient solutions; roots; soybeans
Abstract:: ... Little information is available on the characteristics of plant roots that determine their effectiveness in nitrate uptake. The effectiveness of nitrate uptake of corn (Zea mays L.), soybeans (Glycine max L.), sorghum (Sorghum bicolor L.), and bromegrass (Bromus inermus L.) intact roots were investigated in nutrient solution culture. The maximum uptake rate per centimeter of root for corn occurred ...
DOI:: 10.2134/jeq1974.00472425000300010009x
: https://doi.org/10.2134/jeq1974.00472425000300010009x

15. Effect of Honey Bees on Yield of Three Soybean Cultivars

Author:: Eric H. Erickson
Source:: Crop science 1975 v.15 no.1 pp. 84-86
ISSN:: 0011-183X
Subject:: Apis mellifera; Glycine max; cultivars; florets; foraging; honey bees; nectar; pesticide application; pollination; soybeans
Abstract:: ... The importance of insects in the pollination of soybeans [Glycine max (L.) Merr.] was studied over a year period by comparing the yields from plots caged with honey bees (Apis mellifera L.), plots without bees and without insects (insecticide treatment), and open plots. The pollinating activity of bees resulted in significantly greater yields from ‘Corsoy’ and ‘Hark’ cultivars but not from ‘Chippe ...
DOI:: 10.2135/cropsci1975.0011183X001500010025x
: https://doi.org/10.2135/cropsci1975.0011183X001500010025x

16. Effects of B Application on Soybean Yield, Chemical Composition, and Related Characteristics

Author:: J. T. Touchton; F. C. Boswell
Source:: Agronomy journal 1975 v.67 no.3 pp. 417-420
ISSN:: 0002-1962
Subject:: Glycine max; application rate; chemical composition; coastal plain soils; coastal plains; crop yield; cultivars; foliar application; leaves; oils; piedmont soils; seed size; soybeans; water solubility
Abstract:: ... Soybeans (Glycine max L. Merr.) are generally considered not to respond to B applications. A few responses to B application on soybeans have been reported for soils similar to those reported here. In addition, toxicities have been reported but not related to methods of application with current recommended cultivars. The purpose of these studies was to compare the effects of broadcast and foliar ap ...
DOI:: 10.2134/agronj1975.00021962006700030035x
: https://doi.org/10.2134/agronj1975.00021962006700030035x

17. Estimation of Leaflet, Trifoliolate, and Total Leaf Areas of Soybeans

Author:: J. V. Wiersma; T. B. Bailey
Source:: Agronomy journal 1975 v.67 no.1 pp. 26-30
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; equations; leaf area; leaves; prediction; soybeans
Abstract:: ... The importance of rapid, nondestuctive, and accurate measurements of leaf area for agronomic and physiological studies is well known. Several mathematical formulas have been derived for estimating leaf areas for numerous crops, but there is little information available for soybeans [Glycine max (L.) Merr.]. The purpose of this study, therefore, was to develop prediction equations for estimating le ...
DOI:: 10.2134/agronj1975.00021962006700010007x
: https://doi.org/10.2134/agronj1975.00021962006700010007x

18. Inheritance of Reaction to Race 4 of Soybean-cyst Nematode

Author:: J. D. Thomas; C. E. Caviness; R. D. Riggs; E. E. Hartwig
Source:: Crop science 1975 v.15 no.2 pp. 208-210
ISSN:: 0011-183X
Subject:: Glycine max; backcrossing; cultivars; loci; soybeans
Abstract:: ... Five soybean (Glycine max L. Merr.) crosses involving parents that differed in reaction to race 4 of soybean-cyst nematode (SCN) (Heterodera glycines Ichinohe) were studied in F₁, F₂, and backcross populations. Reaction of the parents to race 4 was: PI 88788, resistant; PI 90763, moderately resistant; ‘Peking,’ susceptible; ‘Mack’ and ‘Hill,’ very susceptible. Frequency distributions from three cr ...
DOI:: 10.2135/cropsci1975.0011183X001500020020x
: https://doi.org/10.2135/cropsci1975.0011183X001500020020x

19. Variability of Floral Characteristics Influences Honey Bee Visitation to Soybean Blossoms

Author:: E. H. Erickson
Source:: Crop science 1975 v.15 no.6 pp. 767-771
ISSN:: 0011-183X
Subject:: Apis mellifera; Glycine max; cleistogamy; color; cultivars; flower size; fluorescent lighting; honey bees; nectar; nectar secretion; odors; soybeans; weather; Wisconsin
Abstract:: ... Group O-III cultivars of soybean, Glycine max (L.) Merr., screened for floral variability (e.g. flower size, color, abundance, cleistogamy, aroma, ncctar production, and blossom sequence) demonstrated a continuum between extreme limits for most of these factors. Cultivars potentially attractive to honey bees (Apis mellifera L.) were ranked from high to low, based on their rate of nectar secretion. ...
DOI:: 10.2135/cropsci1975.0011183X001500060008x
: https://doi.org/10.2135/cropsci1975.0011183X001500060008x

20. Effect of Planting Depth, Temperature, and Cultivars on Emergence and Yield of Double Cropped Soybeans

Author:: Donald J. Stucky
Source:: Agronomy journal 1976 v.68 no.2 pp. 291-294
ISSN:: 0002-1962
Subject:: Glycine max; crop yield; cultivars; double cropping; field experimentation; germination; growth chambers; maturity groups; no-tillage; peat; planting depth; sand; silt loam soils; soil water; soybeans; temperature; wheat; Illinois
Abstract:: ... Adequate soil moisture may not be available in the first 5 cm of soil for the germination and emergence of soybeans [Glycine max (L.) Merr.] planted immediately after wheat is harvested. Since soil moisture generally increases with depth, deeper planting may be advantageous to help unsure an adequate plant population. Three experiments were conducted to determine the influence of planting depth an ...
DOI:: 10.2134/agronj1976.00021962006800020022x
: https://doi.org/10.2134/agronj1976.00021962006800020022x

21. Evidence of Inheritance of Resistance to the Mexican Bean Beetle in Soybeans

Author:: V. A. Sisson; P. A. Miller; W. V. Campbell; J. W. Van Duyn
Source:: Crop science 1976 v.16 no.6 pp. 835-837
ISSN:: 0011-183X
Subject:: Epilachna varivestis; Glycine max; additive gene effects; cultivars; genetic variance; heritability; normal distribution; phenotype; progeny
Abstract:: ... The inheritance of resistance to the Mexican bean beetle, (Epilachna varivestis Mulsant), in soybeans, (Glycine max L. Merr.), was evaluated using F₃ populations. Four populations were obtained by crossing resistant plant introductions to susceptible commercial cultivars. Ratings of percent foliar damage were made on F₃ progeny rows containing 25 plants. Progeny rows were replicated two to four ti ...
DOI:: 10.2135/cropsci1976.0011183X001600060025x
: https://doi.org/10.2135/cropsci1976.0011183X001600060025x

22. Foliar Fertilization of Soybeans During the Seed-filling Period

Author:: Ramon Garcia L.; John J. Hanway
Source:: Agronomy journal 1976 v.68 no.4 pp. 653-657
ISSN:: 0002-1962
Subject:: Glycine max; NPK fertilizers; application rate; crop yield; cultivars; developmental stages; field experimentation; filling period; foliar application; leaves; nutrient uptake; nutrients; photosynthesis; potassium; potassium sulfate; seed size; seeds; soil; soybeans; spraying; urea
Abstract:: ... Foliar fertilization of soybeans (Glycine max (L.) Merr.) with N, P, K and S during the seed-filling period promises to increase soybean yields. Such foliar applications could be used to avoid the depletion of these nutrients in the leaves and the resulting reduction in photosynthetic rate during this period due to poor nutrient uptake from the soil and translocation of these elements from the lea ...
DOI:: 10.2134/agronj1976.00021962006800040030x
: https://doi.org/10.2134/agronj1976.00021962006800040030x

23. Influence of Terminal Bud Removal on the Growth and Seed Yield of Soybeans

Author:: M. E. Bauer; J. W. Pendleton; J. E. Beuerlein; S. R. Ghorashy
Source:: Agronomy journal 1976 v.68 no.5 pp. 709-711
ISSN:: 0002-1962
Subject:: Argiudolls; Glycine max; apical dominance; cultivars; field experimentation; flowering; leaf area index; lodging; montmorillonite; petioles; plant density; planting density; pods; seed weight; seed yield; seeds; silt loam soils; sowing; soybeans; temperature; vegetative growth
Abstract:: ... In recent years soybean (Glycine max (L.) Merr.) yields seem to have reached an upper limit under prevailing moisture and temperature conditions using the current set of production practices. The present study was conducted to determine if changes in soybean growth resulting from removal of the terminal bud during vegetative or early reproductive stages of development would increase seed yield. Th ...
DOI:: 10.2134/agronj1976.00021962006800050004x
: https://doi.org/10.2134/agronj1976.00021962006800050004x

24. Inheritance of Sensitivity to Metribuzin in Soybeans

Author:: C. J. Edwards; W. L. Barrentine; T. C. Kilen
Source:: Crop science 1976 v.16 no.1 pp. 119-120
ISSN:: 0011-183X
Subject:: Glycine max; backcrossing; cultivars; metribuzin; nutrient solutions; recessive genes; soybeans
Abstract:: ... Two soybean [Glycine max (L.) Meir.] cultivars, ‘Semmes’ and ‘Hood,’ differing in sensitivity to the herbicide metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazine-5(4H)one] were studied with their F₁, F₂, and backcross F₃ generations to determine the inheritance of metribuzin sensitivity. The herbicide was added to the nutrient solution in which the plants were growing to insure uniform he ...
DOI:: 10.2135/cropsci1976.0011183X001600010032x
: https://doi.org/10.2135/cropsci1976.0011183X001600010032x

25. Leaf-feeding Resistance to Bollworm and Tobacco Budworm in Three Soybean Plant Introductions

Author:: J. H. Hatchett; G. L. Beland; E. E. Hartwig
Source:: Crop science 1976 v.16 no.2 pp. 277-280
ISSN:: 0011-183X
Subject:: Epilachna varivestis; Glycine max; Helicoverpa zea; Heliothis virescens; antibiosis; cultivars; introduced plants; larvae; mortality; pupae; pupation; soybeans
Abstract:: ... Three plant introductions (PI 171451, PI 227687, and PI 229358) of soybean [Glycine max (L.) Merr.] having resistance to the Mexican bean beetle [Epilachna variveslis Mulsant] were evaluated in the laboratory for leaffeeding resistance (antibiosis) to the bollworm [Heliothis zea (Boddie)] and tobacco budworm [H. virescens (Fabricius)]. Five commercial cultivars were used for comparison. Criteria f ...
DOI:: 10.2135/cropsci1976.0011183X001600020030x
: https://doi.org/10.2135/cropsci1976.0011183X001600020030x

26. Manganese Deficiency and Toxicity Levels for ‘Bragg’ Soybeans

Author:: K. Ohki
Source:: Agronomy journal 1976 v.68 no.6 pp. 861-864
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; greenhouses; guidelines; leaves; manganese; nutrient solutions; plant analysis; soybeans; toxicity
Abstract:: ... The lower and upper critical Mn levels in soybeans [Glycine max (L.) Merr.], which are not documented, were determined to provide guideline values for estimating the Mn status from deficiency through toxicity. Soybean (‘Bragg’) was grown in Hoagland nutrient solution with 14 Mn levels from O to 50,000 μg/liter. The plants were grown in the greenhouse for 33 days, harvested and analyzed for Mn. The ...
DOI:: 10.2134/agronj1976.00021962006800060007x
: https://doi.org/10.2134/agronj1976.00021962006800060007x

27. Reflectant Induced Modification of Soybean Canopy Radiation Balance IV. Leaf and Canopy Temperature

Author:: Maximo W. Baradas; Blaine L. Blad; Norman J. Rosenberg
Source:: Agronomy journal 1976 v.68 no.6 pp. 843-848
ISSN:: 0002-1962
Subject:: Glycine max; absorptivity; canopy; cultivars; leaves; scanners; soybeans; temperature; thermocouples; thermography; thermometers; transpiration; water use efficiency
Abstract:: ... Potential water-savings and increased water use efficiency may result from reflectant-induced modification of the canopy radiation balance. This report is the fourth in a series of papers describing reflectant treatment effects on the radiation balance. The purpose of this study was to determine the effect of reflectant treatment on the leaf and canopy temperature of two soybean [Glycine max (L.) ...
DOI:: 10.2134/agronj1976.00021962006800060002x
: https://doi.org/10.2134/agronj1976.00021962006800060002x

28. Response of Soybeans in Maturity Groups V, VI, VII, and VIII to End-trimming

Author:: H. R. Boerma; W. H. Marchant; M. B. Parker
Source:: Agronomy journal 1976 v.68 no.5 pp. 723-725
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; flowering; genotype; maturity groups; plant height; seed yield; soybeans; United States
Abstract:: ... Accurate field plot technique is an important factor in soybean [Glycine max (L.) Merr.], cultivar and strain seed yield evaluation. Information on end effects in seed yield trials of soybeans grown in the southern region of the US is not available. The purposes of the present study were to determine the importance of these effects and the measures required to control them. Three soybean cultivars ...
DOI:: 10.2134/agronj1976.00021962006800050009x
: https://doi.org/10.2134/agronj1976.00021962006800050009x

29. Screening Soybeans for Tolerance to Metribuzin

Author:: W. L. Barrentine; C. J. Edwards; E. E. Hartwig
Source:: Agronomy journal 1976 v.68 no.2 pp. 351-353
ISSN:: 0002-1962
Subject:: Glycine max; breeding lines; breeding programs; cultivars; herbicide resistance; metribuzin; plant breeding; screening; soybeans; United States
Abstract:: ... Studies were initiated to develop a nutrient culture technique to select soybean [Glycine max (L.) Merr.] cultivars or breeding lines for tolerance to the herbicide metribuzin [4-arnino-6-tert-butyl-3-(methylthio)-as-triazine-5(4H) one]. Forty-five soybean cultivars, representing determinate and determinate types commonly grown in the U.S., were screened in a modified Hoagland's nutrient culture c ...
DOI:: 10.2134/agronj1976.00021962006800020037x
: https://doi.org/10.2134/agronj1976.00021962006800020037x

30. Water-soluble Carbohydrate Accumulation in Soybean Plants

Author:: E. J. Dunphy; J. J. Hanway
Source:: Agronomy journal 1976 v.68 no.5 pp. 697-700
ISSN:: 0002-1962
Subject:: Glycine max; colorimetry; cultivars; filling period; glucose; growing season; petioles; pods; seeds; soil; soybeans; stems; water solubility
Abstract:: ... Because metabolic processes in plants are dependent on water-soluble carbohydrates (WSC), information concerning the effects of different factors on the WSC contents of plants should be useful in the development of improved practices. Soybean [Glycine max (L.) Merrill] plant samples from field fertility experiments on Webster soil (Typic Haplaquoll) were collected and analyzed during two growing s ...
DOI:: 10.2134/agronj1976.00021962006800050001x
: https://doi.org/10.2134/agronj1976.00021962006800050001x

31. Components of Developing Soybean Seeds: Oil, Protein, Sugars, Starch, Organic Acids, and Amino Acids

Author:: Bahman Yazdi-Samadi; R. W. Rinne; R. D. Seif
Source:: Agronomy journal 1977 v.69 no.3 pp. 481-486
ISSN:: 0002-1962
Subject:: Glycine max; amino acids; cellulose; chemical analysis; citric acid; crude fiber; cultivars; flowering; fructose; galactose; glucose; greenhouses; oils; raffinose; regression analysis; seed weight; seeds; soybeans; stachyose; starch; sucrose; water solubility
Abstract:: ... A thorough chemical analysis on the composition of developing soybean [Glycine max (L.) Merr.] seeds does not appear in the literature. Several investigators have determined protein and oil, while others have determined the carbohydrates. The purpose of this study was to make a thorough analysis of the developing soybean seed, including protein, oil, sugars, starch, organic acids, and amino acids. ...
DOI:: 10.2134/agronj1977.00021962006900030037x
: https://doi.org/10.2134/agronj1977.00021962006900030037x

32. Degrees of Differentiation Obtained in Tissue Cultures of Glycine Species

Author:: W. D. Beversdorf; E. T. Bingham
Source:: Crop science 1977 v.17 no.2 pp. 307-311
ISSN:: 0011-183X
Subject:: 2,4-D; Glycine max; callus; cultivars; culture media; hypocotyls; indole acetic acid; kinetin; liquids; plantlets; soybeans
Abstract:: ... Tissues of soybean, Glycine max (L.) Merr., and several wild Glycine species were cultured with the goal of regenerating whole plants from callus. Hypocotyls and ovaries were cultured on semi-solid and liquid media with varying concentrations and combinations of hormones. Maximum callus fresh weight accumulations after 28 days occurred on a medium with 0.4 to 0.8 mg/liter, 2,4-D and 0.25 to 0.5 mg ...
DOI:: 10.2135/cropsci1977.0011183X001700020019x
: https://doi.org/10.2135/cropsci1977.0011183X001700020019x

33. Distribution of Sugars in the Soybean Embryo

Author:: Stephen J. Openshaw; T. Hymowitz; H. H. Hadley
Source:: Crop science 1977 v.17 no.6 pp. 975-977
ISSN:: 0011-183X
Subject:: Glycine max; cotyledons; cultivars; raffinose; soybeans; stachyose; sucrose; sugar content
Abstract:: ... In order to investigate the possibility of using single seed selection to change sugar content in soybean (Glycine max (L.) Merr.) seed, the distribution of sugars in the soybean embryo was studied. Seeds of soybean cultivars ‘Jogun’ and ‘Hokkaido’ were sliced into three equal parts with the slices being made parallel to the root: shoot axis. The slices were then analyzed for sugar content by gas- ...
DOI:: 10.2135/cropsci1977.0011183X001700060042x
: https://doi.org/10.2135/cropsci1977.0011183X001700060042x

34. Effect of Soil Al Saturation on Nutrient Concentration of Soybean Tops, Roots, and Nodules

Author:: J. B. Sartain; E. J. Kamprath
Source:: Agronomy journal 1977 v.69 no.5 pp. 843-845
ISSN:: 0002-1962
Subject:: Glycine max; aluminum; calcium; calcium carbonate; cultivars; exchangeable aluminum; greenhouse experimentation; lateral roots; magnesium; nutrient content; pH; sandy loam soils; soybeans
Abstract:: ... A small amount of information is available on the effects of Al saturation on the nutrient concentration of different plant components. This manuscript presents data showing the former relative to the soybean [Glycine max (L.) Merr.]. To study the effects of varying exchangeable Al saturation on the concentration of P, Ca, Mg, and A1 in the tops, primary roots, lateral roots, and nodules of soybea ...
DOI:: 10.2134/agronj1977.00021962006900050029x
: https://doi.org/10.2134/agronj1977.00021962006900050029x

35. Genetic Improvement in Yield of Soybeans

Author:: Virgil D. Luedders
Source:: Crop science 1977 v.17 no.6 pp. 971-972
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; genetic improvement; plant height; recurrent selection; soybeans
Abstract:: ... Average soybean (Glycine max (L.) Merr.) yields have increased considerably due to changes in cultivars and cultural practices. To evaluate the genetic improvement, yields, lodging, and plant height of 21 cultivars were determined in 3 years. Most of these cultivars were involved in essentially two cycles of recurrent selection. Yield increases were 26 and 16% for the first and second cycles of se ...
DOI:: 10.2135/cropsci1977.0011183X001700060040x
: https://doi.org/10.2135/cropsci1977.0011183X001700060040x

36. Influence of Simulated Early Lodging upon Soybean Seed Yield and its Components

Author:: S. J. Woods; M. L. Swearingin
Source:: Agronomy journal 1977 v.69 no.2 pp. 239-242
ISSN:: 0002-1962
Subject:: Glycine max; apical dominance; cultivars; flowering; lodging; lodging resistance; plant growth; pods; seed size; seed yield; seeds; silt loam soils; silty clay loam soils; soybeans; Indiana
Abstract:: ... Early lodging of soybeans [Glycine max (L.) Merr.] in highly productive environments has been observed throughout the midwestern United States. It has been established that soybean seed yields are decreased when severe lodging occurs sometime prior to physiological maturity. The objective of this 2-year field study was to examine the effect of plant growth stage at the time of lodging on soybean s ...
DOI:: 10.2134/agronj1977.00021962006900020011x
: https://doi.org/10.2134/agronj1977.00021962006900020011x

37. Inheritance of a Brachytic Character in Soybeans

Author:: T. C. Kilen
Source:: Crop science 1977 v.17 no.6 pp. 853-854
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; plant height; recessive genes; soybeans
Abstract:: ... An F₃ soybean [Glycine max (L.) Merr.] breeding line (D74-BH) was crossed with the cultivar ‘Tracy’ to study the inheritance of a brachytic character. D74-BL-4 was only 59% as tall as Tracy, but had a similar number of nodes. Average plant height and node number of the F₁ plants were slightly greater than those of Tracy. Segregation for the brachytic character fit a 3:1 ratio in the F₃ population, ...
DOI:: 10.2135/cropsci1977.0011183X001700060009x
: https://doi.org/10.2135/cropsci1977.0011183X001700060009x

38. Leaf Area and CO2-exchange Rate as Determinants of the Rate of Vegetative Growth in Soybean Plants

Author:: Stuart L. Kaplan; H. R. Koller
Source:: Crop science 1977 v.17 no.1 pp. 35-38
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; gas exchange; leaf area; leaves; mesophyll; soybeans; specific leaf weight; vegetative growth
Abstract:: ... The purpose of this experiment was to examine the interrelationships between CO₂-exchange rate (CER) and certain growth analysis variables in soybean [Glycine max (L.) Merr.] plants. Soybean plants representing 16 cultivars were grown in a controlled environment chamber. At 22 and 29 days after planting, leaf area and dry weights of the leaves, supporting tissue, and roots were measured for each p ...
DOI:: 10.2135/cropsci1977.0011183X001700010011x
: https://doi.org/10.2135/cropsci1977.0011183X001700010011x

39. Leaf Photosynthetic Characteristics of Determinate Soybean Cultivars

Author:: A. S. Bhagsari; D. A. Ashley; R. H. Brown; H. R. Boerma
Source:: Crop science 1977 v.17 no.6 pp. 929-932
ISSN:: 0011-183X
Subject:: Glycine max; carbon dioxide; cultivars; greenhouses; leaves; maturity groups; mesophyll; photorespiration; soybeans; transpiration
Abstract:: ... Apparent photosynthesis (AP), photorespiration (Pr), transpiration (T), specific leaf weight (SLW), and diffusion resistances were measured to characterize these physiological parameters in 16 determinate soybean [Glycine max (L.) Merr.] cultivars, four each in maturity groups V through VIII. Data were obtained on 12 to 16-day-old terminal leaflets attached to plants grown in a greenhouse. In thre ...
DOI:: 10.2135/cropsci1977.0011183X001700060028x
: https://doi.org/10.2135/cropsci1977.0011183X001700060028x

40. Resistance of selected Soybean Genotypes and Segregating Populations to Cabbage Looper Feeding

Author:: V. D. Luedders; W. A. Dickerson
Source:: Crop science 1977 v.17 no.3 pp. 395-397
ISSN:: 0011-183X
Subject:: Glycine max; Trichoplusia ni; cultivars; soybeans
Abstract:: ... Soybean [Glycine max L. (Merr.)] introductions PI 171451, PI 227687, and PI 229358; commercial cultivars ‘Amsoy 71’ and ‘Beeson’; and F₃ and F₄ generations of four resistant-susceptible crosses were field tested for resistance to leaf feeding by second-instar cabbage looper larvae (Trichoplusia ni Hubner). The three plant introductions were highly significantly more resistant than the two commerci ...
DOI:: 10.2135/cropsci1977.0011183X001700030013x
: https://doi.org/10.2135/cropsci1977.0011183X001700030013x

41. Response of Indeterminate and Determinate Soybean Cultivars to Defoliation and Half-plant Cut-off

Author:: W. R. Fehr; C. E. Caviness; J. J. Vorst
Source:: Crop science 1977 v.17 no.6 pp. 913-917
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; defoliation; hail; insects; seed maturation; soybeans; Arkansas; Indiana; Iowa
Abstract:: ... The estimation of yield loss from defoliation and stem cut-off is based on the assumptions that soybean (Glycine max (L.) Merr.) cultivars do not differ appreciably in their ability to recover from plant injury, recovery is similar across locations, and percentage yield loss at all reproductive stages can be approximated from research involving only three of the stages. The objective of our study ...
DOI:: 10.2135/cropsci1977.0011183X001700060024x
: https://doi.org/10.2135/cropsci1977.0011183X001700060024x

42. Response of Soybean Cultivars to Narrow Rows and Planting Rates Under Weed-free Conditions

Author:: R. L. Cooper
Source:: Agronomy journal 1977 v.69 no.1 pp. 89-92
ISSN:: 0002-1962
Subject:: Glycine max; chemical control; crop yield; cultivars; herbicides; irrigation; lodging; planting; seeds; sowing; soybeans; weed control; weeds; Illinois
Abstract:: ... With continued development of new and better herbicides for chemical weed control in soybeans, the potential exists for growing soybeans in very narrow rows (17 cm) without cultivation. The objective of this research was to examine the potential yield of soybeans [Glycine max (L.) Merr.] in 17-cm rows under weed free conditions and also to determine the optimum seeding rate and relative yield of t ...
DOI:: 10.2134/agronj1977.00021962006900010023x
: https://doi.org/10.2134/agronj1977.00021962006900010023x

43. Response of Soybeans to Overseeding Followed by Plant Thinning at Various Growth Stages

Author:: H. R. Boerma
Source:: Agronomy journal 1977 v.69 no.3 pp. 508-510
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; developmental stages; direct seeding; lodging; maturity groups; plant height; seed yield; seeds; soybeans
Abstract:: ... Accurate field plot technique is an important factor in soybean [Glycine max (L.) Merr.] experimentation. The practice of overseeding followed by plant thinning has become a common practice for many experiments involving the estimation of physiological parameters, and for some experiments designed to measure seed yield. In most cases the results of these experiments are extended to the general fie ...
DOI:: 10.2134/agronj1977.00021962006900030043x
: https://doi.org/10.2134/agronj1977.00021962006900030043x

44. Response of Wheat Cultivars to Liming in Some High Al Oxisols of Rio Grande do Sul, Brazil

Author:: J. A. Martini; R. A. Kochhann; E. P. Gomes; F. Langer
Source:: Agronomy journal 1977 v.69 no.4 pp. 612-616
ISSN:: 0002-1962
Subject:: Gaeumannomyces graminis var. graminis; Glycine max; Triticum aestivum; Udox; acid soils; aluminum; cultivars; disease incidence; exchangeable aluminum; limestone; liming; manganese; residual effects; soil pH; soil quality; toxicity; wheat; Brazil
Abstract:: ... The objective of this field study was to determine the yield response of wheat (Triticum aestivum L.) to the direct and residual effects of liming in relation to variety, soil acidity, Al toxicity, P availability, and disease incidence in five Oxisols of Rio Grande do Sul, Brazil under successive wheat-soybean (Glycine max L. Merrill) cropping. This work was carried out under field conditions usin ...
DOI:: 10.2134/agronj1977.00021962006900040022x
: https://doi.org/10.2134/agronj1977.00021962006900040022x

45. Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans as Affected by Nitrogen and Molybdenum

Author:: M. B. Parker; H. B. Harris
Source:: Agronomy journal 1977 v.69 no.4 pp. 551-554
ISSN:: 0002-1962
Subject:: Glycine max; Hapludults; Rhodudults; acid soils; cultivars; isogenic lines; leaves; molybdenum; nitrate reduction; nitrogen; pH; plant response; soybeans; symbiosis
Abstract:: ... Investigators have suggested that soybean [Glycine max (L.) Merr.] response to Mo was essentially a correction of N deficiency, and a series of experiments was conducted on acid soils (pH ranged from 4.5 to 5.6) to evaluate the suggestion. In the first series of experiments, yield response to Mo and N rates was studied for 3 years on soybean cultivars grown on Dyke 1 (Typic Rhodudult) and State 1 ...
DOI:: 10.2134/agronj1977.00021962006900040007x
: https://doi.org/10.2134/agronj1977.00021962006900040007x

46. Aluminum Tolerance of Soybean Cultivars Based on Root Elongation in Solution Culture Compared with Growth in Acid Soil

Author:: J. B. Sartain; E. J. Kamprath
Source:: Agronomy journal 1978 v.70 no.1 pp. 17-20
ISSN:: 0002-1962
Subject:: Glycine max; Paleaquults; acid soils; aluminum; calcium; cultivars; greenhouse experimentation; metal tolerance; plant tissues; root growth; roots; soybeans; subsoil; toxicity
Abstract:: ... Growth of soybean [Glycine max (L.) Merr.] roots into acid subsoils and utilization of subsoil moisture is limited in many soils of the southeastern U. S. because of Al toxicity. Laboratory and greenhouse experiments were conducted to obtain information on tolerance of soybean cultivars which would be helpful in selection of cultivars best adapted to acid subsoils. Root elongation measurements wer ...
DOI:: 10.2134/agronj1978.00021962007000010005x
: https://doi.org/10.2134/agronj1978.00021962007000010005x

47. Effect of Day and Night Temperatures During Floral Induction on Morphology of Soybeans

Author:: Judith F. Thomas; C. David Raper
Source:: Agronomy journal 1978 v.70 no.6 pp. 893-898
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; apical dominance; carbon dioxide; cultivars; flowering; greenhouses; internode length; leaves; night temperature; simulation models; soybeans
Abstract:: ... Temperature affects the vegetative and reproductive morphology of soybeans [Glycine max (L.) Merrill]. Descriptive information of the effects of temperature will assist in development of a dynamic simulation model. The purpose of this study was to determine the effects of day and night temperatures on growth and development of the determinate soybean cultivar ‘Ransom’. Seedlings were grown under a ...
DOI:: 10.2134/agronj1978.00021962007000060001x
: https://doi.org/10.2134/agronj1978.00021962007000060001x

48. Effect of Plant Population on Yield and Height Characteristics in Determinate Soybeans

Author:: A. L. Hoggard; J. Grover Shannon; D. R. Johnson
Source:: Agronomy journal 1978 v.70 no.6 pp. 1070-1072
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; field experimentation; internode length; plant density; soil; soybeans
Abstract:: ... Lodging resistance may be an important factor in determining how soybean [Glycine max (L.) Merr.] cultivars respond to high populations. Therefore, the effects of plant population on yield, lodging, pod number, height, internode number, and average internode length for the lower, center and upper main stem internode regions, in determinate soybean cultivars differing in lodging resistance were stu ...
DOI:: 10.2134/agronj1978.00021962007000060042x
: https://doi.org/10.2134/agronj1978.00021962007000060042x

49. Effects of Environment and Management on Soybean Performance in the Tropics

Author:: D. K. Whigham; H. C. Minor; S. G. Carmen
Source:: Agronomy journal 1978 v.70 no.4 pp. 587-592
ISSN:: 0002-1962
Subject:: Glycine max; NPK fertilizers; agronomic traits; altitude; cultivars; farmers; fertilizer application; flowering; latitude; photoperiod; plant height; potassium fertilizers; seed weight; soybeans; temperate zones; temperature; tropics
Abstract:: ... Yield potential of soybeans [Glycine max (L.) Merr.] in tropical areas is similar to that in temperate regions. Yield variability among sites indicates that exploitation of this potential under tropical conditions will require a better understanding of how environment and management influence yield. This study was undertaken to investigate the effects of several environmental and management variab ...
DOI:: 10.2134/agronj1978.00021962007000040017x
: https://doi.org/10.2134/agronj1978.00021962007000040017x

50. Flowering, Abortion, and Yield of Early-Maturing Soybeans at Three Densities

Author:: Carlos Dominguez; D. J. Hume
Source:: Agronomy journal 1978 v.70 no.5 pp. 801-805
ISSN:: 0002-1962
Subject:: Glycine max; Hapludalfs; cultivars; flowering; flowers; genotype; plant height; planting; pods; seed size; seed yield; seeds; silty clay loam soils; sowing; soybeans; yield components; North America
Abstract:: ... Attempts to extend the northern limits of soybean [Glycine max (L.) Merr.] production in North America are hampered by low yields. The earliest-maturing genotypes are small, short-statured plants. Their size suggests that yields could be increased by raising the plant population. In these trials, the early-maturing genotypes, ‘Fiskeby V’, ‘052–903’, ‘Altona,’ and ‘Vansoy’, were grown in 30-cm row ...
DOI:: 10.2134/agronj1978.00021962007000050025x
: https://doi.org/10.2134/agronj1978.00021962007000050025x

51. Influence of Soybean Seed Size and Position on the Rate and Duration of Filling

Author:: D. B. Egli; J. E. Leggett; J. M. Wood
Source:: Agronomy journal 1978 v.70 no.1 pp. 127-130
ISSN:: 0002-1962
Subject:: Glycine max; Paleudults; air temperature; cultivars; dry matter accumulation; filling period; pods; seed growth; seed size; silt loam soils; soybeans
Abstract:: ... Information on factors influencing the rate and duration of seed growth is needed to understand completely yield production. This study was undertaken to determine the relationship of seed size and the timing of pod development to the rate and duration of seed growth in soybeans (Glycine max (L.) Merrill). Field studies were conducted for 2 years (1974-75) on a Maury silt loam soil (Typic Paleudul ...
DOI:: 10.2134/agronj1978.00021962007000010029x
: https://doi.org/10.2134/agronj1978.00021962007000010029x

52. Irrigation Effects on Vegetative and Reproductive Development of Three Soybean Cultivars

Author:: D. A. Ashley; W. J. Ethridge
Source:: Agronomy journal 1978 v.70 no.3 pp. 467-471
ISSN:: 0002-1962
Subject:: Glycine max; Paleudults; cultivars; field experimentation; fruiting; irrigation; kaolinite; pods; sandy loam soils; seed yield; soil water; soybeans
Abstract:: ... Previous investigations have demonstrated a response in soybean [Glycine max (L.) Merr.] yields to supplemental water applications during reproductive development, but few have described the effects of irrigation during different development periods on fruiting patterns and vegetative development in relation to yields. Variables included in this field experiment were four moisture regimes — unirri ...
DOI:: 10.2134/agronj1978.00021962007000030026x
: https://doi.org/10.2134/agronj1978.00021962007000030026x

53. Management of Irrigated Soybeans on a Moderately Coarse-textured Soil in the Upper Midwest

Author:: D. K. Cassel; Armand Bauer; D. A. Whited
Source:: Agronomy journal 1978 v.70 no.1 pp. 100-104
ISSN:: 0002-1962
Subject:: Glycine max; arid lands; coarse-textured soils; cropping systems; cultivars; developmental stages; experimental design; grain yield; irrigated conditions; irrigation scheduling; irrigation water; nitrate nitrogen; nitric oxide; nitrogen fertilizers; planting date; probability; rooting; sandy loam soils; soil profiles; soil sampling; soil texture; soybeans; tensiometers; Midwestern United States
Abstract:: ... Increased availability of water for supplemental irrigation in the upper Midwest has enhanced an interest in growing soybeans [Glycine max (L.) Merr.] on moderately coarse-textured soils where they have not previously been introduced. The objectives of this study were to determine the yield potential of supplementally irrigated soybeans on these soils and to develop an irrigation schedule for effi ...
DOI:: 10.2134/agronj1978.00021962007000010023x
: https://doi.org/10.2134/agronj1978.00021962007000010023x

54. Photosynthetically Active Radiation, CO2 Uptake, and Stomatal Diffusive Resistance Profiles Within Soybean Canopies

Author:: J. L. Hatfield; R. E. Carlson
Source:: Agronomy journal 1978 v.70 no.4 pp. 592-596
ISSN:: 0002-1962
Subject:: Glycine max; canopy; carbon dioxide; cold; crop production; cultivars; developmental stages; environmental factors; leaf area index; leaves; linear models; photons; photosynthesis; photosynthetically active radiation; regression analysis; silt loam soils; soil water; solar radiation; soybeans; stomatal conductance; temperature
Abstract:: ... Profiles of PPFD (photosynthetic photon flux density), CO₂ uptake and stomatal diffusive resistance were measured in field-grown canopies of Hark and Rampage soybeans [Glycine max (L.) Merr.]. These studies were conducted to examine and quantify the relationships between these parameters over the daylight period for discrete canopy stratum and the complete canopy. Measurements were made in the fie ...
DOI:: 10.2134/agronj1978.00021962007000040018x
: https://doi.org/10.2134/agronj1978.00021962007000040018x

55. Reproductive Advantage Associated with Resistance to Soybean-Cyst Nematode

Author:: V. D. Luedders; L. A. Duclos
Source:: Crop science 1978 v.18 no.5 pp. 821-823
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; soil
Abstract:: ... Cultivars of soybeans [Glycine max (L.) Merr.] resistant (R) and susceptible (S) to the soybean-cyst nematode (Heterodera glycines Ichinohe) were grown separately and together on plots heavily infested with tl~e nematodes and on noninfested plots. Two-cultivar (R and S) mixtures in three maturity groups were grown at three densities for 3 years; each cultivar was also grown in pure stand. The mixt ...
DOI:: 10.2135/cropsci1978.0011183X001800050034x
: https://doi.org/10.2135/cropsci1978.0011183X001800050034x

56. Response of Soybeans to Commercial Soil-Applied Inoculants

Author:: D. W. Nelson; M. L. Swearingin; L. S. Beckham
Source:: Agronomy journal 1978 v.70 no.3 pp. 517-518
ISSN:: 0002-1962
Subject:: Bradyrhizobium japonicum; Glycine max; cultivars; grain composition; grain yield; leaves; nitrogen content; nodulation; seeds; silty clay loam soils; soybeans; total phosphorus; Corn Belt region
Abstract:: ... Recent development of soil-applied inoculants, which have been advertised in midwestern states as increasing yields by an average of 10%, has stimulated a great deal of interest among soybean (Glycine max (L.) Merr.) producers. Field studies with two soybean varieties were conducted over 2 years (three different cultivars were used), to evaluate crop response to application of commercial soil-appl ...
DOI:: 10.2134/agronj1978.00021962007000030041x
: https://doi.org/10.2134/agronj1978.00021962007000030041x

57. Soybean Response to Selected Rice Herbicides

Author:: E. F. Eastin
Source:: Crop science 1978 v.18 no.6 pp. 967-968
ISSN:: 0011-183X
Subject:: Glycine max; Oryza sativa; bifenox; chlorpropham; crop yield; cultivars; leaves; molinate; oxadiazon; propanil; rice; soybeans; spray drift; thiobencarb; Southeastern United States
Abstract:: ... Occasionally rice (Oryza sativa L.) herbicide drift or accidental overspray to adjacent growing soybeans [Glycine max (L.) Merr.] occurs in the southeastern U.S. Therefore, five current, or potential, rice herbicides, either alone or in combination with propanil (3',4'-dichloropropionanilide), were applied in the field for 2 years to the soybean cultivar ‘Davis’ when either three (V3) or eight (V8 ...
DOI:: 10.2135/cropsci1978.0011183X001800060014x
: https://doi.org/10.2135/cropsci1978.0011183X001800060014x

58. Soybean Root Growth during the Reproductive Stages of Development

Author:: T. C. Kaspar; C. D. Stanley; H. M. Taylor
Source:: Agronomy journal 1978 v.70 no.6 pp. 1105-1107
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; root growth; seed development; soybeans
Abstract:: ... Controversy exists concerning photosynthate sink relationships associated with seed development and their effects on soybean (Glycine max (L.) Merr.) root development. Seven cultivars were studied in the Ames rhizotron (root observation laboratory) to determine the rate which each cultivar increases its rooting depth during flowering and seed development. Depth of rooting and stage of development ...
DOI:: 10.2134/agronj1978.00021962007000060051x
: https://doi.org/10.2134/agronj1978.00021962007000060051x

59. Differential Cultivar Tolerance in Soybean to Phytotoxic Levels of Soil Zn. I. Range of Cultivar Response

Author:: M. C. White; A. M. Decker; R. L. Chaney
Source:: Agronomy journal 1979 v.71 no.1 pp. 121-126
ISSN:: 0002-1962
Subject:: Fragiudults; Glycine max; Sassafras; agronomy; crops; cultivars; greenhouses; leaf dry mass; leaves; pH; phytotoxicity; sandy loam soils; soybeans
Abstract:: ... Heavy metals in waste materials added to agricultural soils can severely inhibit subsequent crop growth. This study was conducted to evaluate the variation in tolerance among cultivars of an agriculturally important plant species to phytotoxic levels of added soil Zn. Twenty soybean (Glycine max L. Merr.) cultivars were screened, through greenhouse pot studies, for their growth response to Zn at p ...
DOI:: 10.2134/agronj1979.00021962007100010031x
: https://doi.org/10.2134/agronj1979.00021962007100010031x

60. Differential Cultivar Tolerance in Soybean to Phytotoxic Levels of Soil Zn. II. Range of Zn Additions and the Uptake and Translocation of Zn, Mn, Fe, and P

Author:: M. C. White; R. L. Chaney; A. M. Decker
Source:: Agronomy journal 1979 v.71 no.1 pp. 126-131
ISSN:: 0002-1962
Subject:: Fragiudults; Glycine max; Sassafras; absorption; agronomy; crops; cultivars; greenhouses; leaf analysis; leaf dry mass; leaves; phytotoxicity; sandy loam soils; soil pH; soybeans
Abstract:: ... This investigation was part of a general characterization of Zn tolerance among cultivars of an agriculturally important plant species. Greenhouse studies were conducted to further evaluate the effect of soil Zn additions on soybean (Glycine max L. Merr.) cultivar differences in Zn tolerance, as well as plant Zn, Mn, Fe, and P contents. Four cultivars selected from a previous Zn tolerance screenin ...
DOI:: 10.2134/agronj1979.00021962007100010032x
: https://doi.org/10.2134/agronj1979.00021962007100010032x

61. Effect Upon Soybean Cultivar Bragg, When P is Band-concentrated Upon Variable Soil-Available P

Author:: R. G. Hanson
Source:: Agronomy journal 1979 v.71 no.2 pp. 267-271
ISSN:: 0002-1962
Subject:: Glycine max; Paleudults; agronomy; cultivars; experimental design; fertilizers; imports; leaves; models; nutrient balance; seed yield; silt loam soils; soybeans; Brazil
Abstract:: ... Soybean (Glycine max (L) Memll) growers in Brazil commonly band corrective and maintenance fertilizer near the seed at planting time. Little information existed to substantiate this as the most efficient P placement method. Because P is an immobile element in the soil and a costly import for Brazilian farmers, placement may be critical This research was undertaken to evaluate the influence of P br ...
DOI:: 10.2134/agronj1979.00021962007100020012x
: https://doi.org/10.2134/agronj1979.00021962007100020012x

62. Effect of Downward Force on Soybean Hypocotyl Growth

Author:: K. H. Knittle; J. S. Burris
Source:: Crop science 1979 v.19 no.1 pp. 47-51
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; hypocotyls; soil temperature; soybeans
Abstract:: ... Factors affecting hypocotyl elongation in soybeans Glycine max (L.) Merr., have not been well studied, with the exception of soil temperature. The limiting effect of soil resistance has not been examined heretofore. Soybean hypocotyl growth was studied in the laboratory. An apparatus was developed to apply a downward force to the apical hook of dark-grown seedlings. An increase in downward force w ...
DOI:: 10.2135/cropsci1979.0011183X001900010011x
: https://doi.org/10.2135/cropsci1979.0011183X001900010011x

63. Elongation Force of Seedlings of Leguminous Crops

Author:: J. Inouye; S. Tanakamaru; K. Hibi
Source:: Crop science 1979 v.19 no.5 pp. 599-602
ISSN:: 0011-183X
Subject:: Arachis hypogaea; Canavalia; Glycine max; Pisum sativum; Vicia faba; Vigna angularis; Vigna radiata var. radiata; cultivars; faba beans; hypocotyls; peanuts; peas; seed weight; seedlings; soybeans; strain gauges
Abstract:: ... Using an unbonded strain gauge transducer and a null balancing recorder, the vertical elongation or lifting forces of 3- and 5-cm tall seedlings of 12 leguminous species grown in darkness at about 23 C were measured. The elongation force (El) gradually increased after initially setting the cotyledons of hypogeous seedlings or plumular hooks of epigeous seedlings against the receptorof the transduc ...
DOI:: 10.2135/cropsci1979.0011183X001900050011x
: https://doi.org/10.2135/cropsci1979.0011183X001900050011x

64. Evaluation of Vigor Tests in Soybean Seeds: Relationship of ATP, Conductivity, and Radioactive Tracer Multiple Criteria Laboratory Tests to Field Performance

Author:: Robert W. Yaklich; Martin M. Kulik; James D. Anderson
Source:: Crop science 1979 v.19 no.6 pp. 806-810
ISSN:: 0011-183X
Subject:: Glycine max; adenosine triphosphate; cultivars; leachates; planting date; protein synthesis; radioactivity; radiolabeling; seeds; soil texture; soil types; soybeans; vigor; water uptake
Abstract:: ... Laboratory tests for ATP content, conductivity of seed steep water, and the multiple criteria were performed on soybean seeds [Glycine max (L.) Merr.] in 1975 and 1976. Results of laboratory tests were compared with emergence and stand data obtained from the same seed lots on two sites (sandy and heavy soil types) and three dates of planting (early, pre-optimum, and optimum) each year. Yield data ...
DOI:: 10.2135/cropsci1979.0011183X001900060015x
: https://doi.org/10.2135/cropsci1979.0011183X001900060015x

65. Field Assessment of Air Pollution-induced Soybean Yield Losses

Author:: R. K. Howell; E. J. Koch; L. P. Rose
Source:: Agronomy journal 1979 v.71 no.2 pp. 285-288
ISSN:: 0002-1962
Subject:: Glycine max; cultivars; ozone; air pollution; air quality; crop yield; growth chambers; field experimentation; environmental factors; Maryland
Abstract:: ... Estimates of soybean [Glycine max (L.) Merr.] yield losses induced by ambient concentrations of air pollutants are ambiguous, but such estimates are Erequently requested and reported. The objectives and justification of this field experiment were to answer the questions: 1) What soybean yield losses are attributable to air pollution and 2) Do open-top chambers properly estimate the impact of air p ...
DOI:: 10.2134/agronj1979.00021962007100020016x
: https://doi.org/10.2134/agronj1979.00021962007100020016x

66. Gaseous Nitrogen Loss from Soybean Foliage

Author:: C. A. Stutte; R. T. Weiland; A. R. Blem
Source:: Agronomy journal 1979 v.71 no.1 pp. 95-97
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; leaves; nitrogen; soybeans; temperature; transpiration; vegetative growth; water solubility
Abstract:: ... The loss of non-elemental N from plant foliage was verified, and the significance of this loss was investigated. Soybean (Glycine max (L.) Merr.) leaf vapors were condensed (–50 C) using a calibrated test tube tra in a closed system. Subsequent N analysis of this congensate revealed water soluble N forms. Since the pyrochemiluminescent technique that was used for N analysis does not detect element ...
DOI:: 10.2134/agronj1979.00021962007100010024x
: https://doi.org/10.2134/agronj1979.00021962007100010024x

67. Genetic Variabilty for Resistance to Propanil Injury in Soybeans

Author:: Missae Karazawa; C. E. Caviness
Source:: Crop science 1979 v.19 no.5 pp. 739-740
ISSN:: 0011-183X
Subject:: Glycine max; Oryza sativa; crossing; cultivars; genes; genetic variation; herbicide resistance; heritability; parents; propanil; rice; soybeans; spray drift; weed control
Abstract:: ... Propanil (3′4′-dichloropropionanilide) is applied by aircraft to rice [Oryza sativa (L.)] for weed control, therefore, injury from spray drift of this herbicide frequently occurs on plants in nearby soybean [Glycine max (L.) Merr.] fields. Severity of injury from drift has been shown to vary among soybean cultivars. We studied genetic variability for resistance to a drift rate in crosses between r ...
DOI:: 10.2135/cropsci1979.0011183X001900050049x
: https://doi.org/10.2135/cropsci1979.0011183X001900050049x

68. Harvest Index of Soybeans as Affected by Planting Date and Maturity Rating

Author:: D. R. Johnson; D. J. Major
Source:: Agronomy journal 1979 v.71 no.4 pp. 538-541
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; frost; harvest index; montmorillonite; petioles; planting date; seed yield; silt loam soils; soybeans
Abstract:: ... Selection for high harvest index has been used by plant breeders to improve the seed yield of several crop plants, but in soybean [Glycine max (L.) Merrill] errors in the estimate of harvest index may occur because of interactions with maturity or seeding date and because harvest index measured at maturity does not include leaf and petiole dry weights. The objective of this study was to examine ha ...
DOI:: 10.2134/agronj1979.00021962007100040004x
: https://doi.org/10.2134/agronj1979.00021962007100040004x

69. Identification of Multiple Insect Resistant Soybean Lines

Author:: J. H. Hatchett; G. L. Beland; T. C. Kilen
Source:: Crop science 1979 v.19 no.4 pp. 557-559
ISSN:: 0011-183X
Subject:: Epilachna varivestis; Glycine max; Helicoverpa zea; Heliothis virescens; Pseudoplusia includens; beans; breeding lines; crossing; cultivars; defoliation; germplasm; greenhouses; insect control; insect resistance; insects; introduced plants; larvae; mortality; plant breeding; pupae; soybeans
Abstract:: ... Five soybean [Glycine max (L) Merr.] breeding lines derived from crosses involving P.I. 229358, a plant introduction with multiple insect resistance, were evaluated in a greenhouse or laboratory for leaf-feeding resistance to the soybean looper (SBL) [Pseudoplusia includens Walker], bollworm (BW) (Heliothis zea Boddie), Mexican bean bettle (MBB) (Epilachna varivestis Mulsant), and tobacco budworm ...
DOI:: 10.2135/cropsci1979.0011183X001900040030x
: https://doi.org/10.2135/cropsci1979.0011183X001900040030x

70. In Vitro Tissue Culture of Selected Legumes and Plant Regeneration from Callus Cultures of Red Clover

Author:: Gregory C. Phillips; G. B. Collins
Source:: Crop science 1979 v.19 no.1 pp. 59-64
ISSN:: 0011-183X
Subject:: Canavalia ensiformis; Glycine max; Medicago sativa; Trifolium pratense; alfalfa; breeding programs; callus; callus culture; cell division; cell suspension culture; cultivars; organogenesis; soybeans; tissue culture
Abstract:: ... A synthetic, chemically defined medium was developed for the initiation and growth of cell and tissue cultures of red clover (Trifolium pratense L.). The medium is broadly supportive and suitable for the culture of other legume species, including alfalfa (Medicago sativa L.), soybeans (Glycine max L.) and jack bean (Canavalia ensiformis L). Cultural variables for red clover were defined, and it is ...
DOI:: 10.2135/cropsci1979.0011183X001900010014x
: https://doi.org/10.2135/cropsci1979.0011183X001900010014x

71. Inheritance of Reaction to Soybean Mosaic Virus in Soybeans

Author:: Romeu A. S. Kiihl; E. E. Hartwig
Source:: Crop science 1979 v.19 no.3 pp. 372-375
ISSN:: 0011-183X
Subject:: Glycine max; Soybean mosaic virus; cultivars; greenhouse experimentation; heterozygosity; homozygosity; inheritance (genetics); scions; soybeans; viruses
Abstract:: ... Eight soybean [Glycine max (L.) Merr.] cultivars previously identiifed as resistant to soybean mosaic virus (SMV) and three susceptible cultivars were used in a study to determine the inheritance of reaction to SMV. Field-grown F₂ and F₃ populations were inoculated with virus strain SMV-1. Greenhouse studies were also conducted in which the stock was inoculated and the reaction of homozygous and h ...
DOI:: 10.2135/cropsci1979.0011183X001900030024x
: https://doi.org/10.2135/cropsci1979.0011183X001900030024x

72. Leaf Conductance and Leaf-Water Potential Relationships for Two Soybean Cultivars Grown Under Controlled Irrigation

Author:: R. E. Carlson; N. N. Momen; O. Arjmand; R. H. Shaw
Source:: Agronomy journal 1979 v.71 no.2 pp. 321-325
ISSN:: 0002-1962
Subject:: Glycine max; Hapludolls; agronomy; cultivars; irrigation; leaf conductance; neutrons; rain; silt loam soils; soil water; soybeans
Abstract:: ... Both leaf-water potential and leaf conductance are used singly or in combination as important indicators of soil moisture stress. The relationship between these two parameters may not be unique between species or even within a species, depending upon environmental conditions. These relationships were studied in soybeans [Glycine max (L.) Merr.] by growing plants in large potometers in the field un ...
DOI:: 10.2134/agronj1979.00021962007100020024x
: https://doi.org/10.2134/agronj1979.00021962007100020024x

73. A Model for Predicting Soybean Yields from Climatic Data

Author:: R. W. Hill; D. R. Johnson; K. H. Ryan
Source:: Agronomy journal 1979 v.71 no.2 pp. 251-256
ISSN:: 0002-1962
Subject:: Crop Environment Resource Synthesis models; Glycine max; crop yield; cultivars; field experimentation; flowering; irrigation scheduling; irrigation water; phenology; photoperiod; plant available water; planting date; prediction; rain; rhizosphere; soil water storage; soybeans; temperature; transpiration
Abstract:: ... The single most important factor that influences soybean (Glycine max (L.) Merr.) yields from one location to another, or from one year to the next, is moisture availability. A better understanding of how water influences yields is essential for maximizing yields through water management practices. The objective of this study was to develop a model that determines soybean yield as a function of mo ...
DOI:: 10.2134/agronj1979.00021962007100020009x
: https://doi.org/10.2134/agronj1979.00021962007100020009x

74. Moisture-Stress Effects on the Yield Components of Two Soybean Cultivars

Author:: N. N. Momen; R. E. Carlson; R. H. Shaw; O. Arjmand
Source:: Agronomy journal 1979 v.71 no.1 pp. 86-90
ISSN:: 0002-1962
Subject:: Glycine max; Hapludolls; cultivars; developmental stages; field crops; leaf area; leaf water potential; leaves; neutrons; plant height; rain; seed size; seed yield; soil water; soybeans; yield components
Abstract:: ... Limited soil moisture influences field crop performance by reducing plant height, the size of the assimilating leaf area, and the size and number of potential storage sites for produced dry matter. The effect of moisture stress on plants is complex and very dependent on the stage of development. Therefore, soybeans (Glycine max (L.) Merr.) cultivars ‘Hark’ and ‘Rampage’ were in grown in the field ...
DOI:: 10.2134/agronj1979.00021962007100010022x
: https://doi.org/10.2134/agronj1979.00021962007100010022x

75. Physiological Maturity in Soybean

Author:: D. M. TeKrony; D. B. Egli; J. Balles; T. Pfeiffer; R. J. Fellows
Source:: Agronomy journal 1979 v.71 no.5 pp. 771-775
ISSN:: 0002-1962
Subject:: Glycine max; carbon 14; carbon dioxide; carbon dioxide production; cell respiration; color; cultivars; developmental stages; greenhouse experimentation; greenhouses; pods; seed coat; seed moisture; seed weight; soybeans; water content
Abstract:: ... A visual indicator of physiological maturity (maximum dry seed weight) in soybean [Glycine max (L.) Merrill] would be useful to researchers and soybean producers. Experiments were conducted utilizing two cultivars in the greenhouse and six cultivars in the field to characterize the color of soybean seeds and pods at physiological maturity. In greenhouse experiments where plants were exposed to ¹⁴C ...
DOI:: 10.2134/agronj1979.00021962007100050016x
: https://doi.org/10.2134/agronj1979.00021962007100050016x

76. Pyro-Chemiluminescent Differentiation of Oxidized and Reduced N Forms Evolved from Plant Foliage

Author:: R. T. Weiland; C. A. Stutte
Source:: Crop science 1979 v.19 no.4 pp. 545-547
ISSN:: 0011-183X
Subject:: Amaranthus palmeri; Glycine max; Gossypium hirsutum; canopy; chemiluminescence; cotton; cultivars; leaves; nitrogen; oxidation; pyrolysis; soybeans; transpiration; water solubility; water stress; weeds
Abstract:: ... Evaluations were made to differentiate the forms of water soluble, non-elemental nitrogen lost with the trans. piration water vapors from plant foliage. Chemiluminescent detection of chemically bound N, with O₂ present as a reactant-carrier gas, and then absent and replaced with N₂ during the pyrolysis of transpiration samples, distinguished the oxidized from the reduced N forms in the transpirate ...
DOI:: 10.2135/cropsci1979.0011183X011200190027x
: https://doi.org/10.2135/cropsci1979.0011183X011200190027x

77. Regression Equations for Rate of Soybean Hypocotyl Elongation by Using Field Data

Author:: K. H. Knittle; J. S. Burris; D. C. Erbach
Source:: Crop science 1979 v.19 no.1 pp. 41-46
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; data collection; equations; hypocotyls; seed germination; seedling growth; seedlings; soil water; soybeans; temperature
Abstract:: ... To identify limiting factors for soybean (Glycine max (L.) Merr.) hypocotyl elongation rate under field conditions, regression equations were obtained from data collected entirely in the field for cultivar ‘Wayne’. Seedling samples were excavated, and hypocotyl lengths were measured periodically from early seedling growth until 50% emergence. Soil factors measured were temperature, moisture percen ...
DOI:: 10.2135/cropsci1979.0011183X001900010010x
: https://doi.org/10.2135/cropsci1979.0011183X001900010010x

78. Relationship Beween Soybean Seed Vigor and Yield

Author:: D. B. Egli; D. M. TeKrony
Source:: Agronomy journal 1979 v.71 no.5 pp. 755-759
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; germination; soybeans; viability; vigor
Abstract:: ... The relationship between the vigor of soybean [Glycine max (L.) Merr.] planting seed and yield of the resulting crop has not been clearly determined. Studies were conducted in 1975, 1976, and 1977 to evaluate the relationship between seed vigor and yield in soybeans by experimental techniques that duplicate as closely as possible practices followed by commercial producers of soybeans. The cultivar ...
DOI:: 10.2134/agronj1979.00021962007100050012x
: https://doi.org/10.2134/agronj1979.00021962007100050012x

79. Single Plant Seed Sources for Uniform Soybean Physiology Tests

Author:: C. A. Stutte; A. R. Blem; R. T. Weiland
Source:: Crop science 1979 v.19 no.3 pp. 324-326
ISSN:: 0011-183X
Subject:: Glycine max; cultivars; physiology; soybeans; variance; Arkansas
Abstract:: ... Soybean [Glycine max (L.) Merr.] plants grown from bulk seed sources and from seed of single parent plants obtained at two edaphically and climatically dissimilar sites in Arkansas were evaluated for uniformity in several physiological and developmental processes. Using the determinate cultivar ‘Davis’, the mean values for the data obtained for most parameters did not differ significantly among th ...
DOI:: 10.2135/cropsci1979.0011183X001900030011x
: https://doi.org/10.2135/cropsci1979.0011183X001900030011x

80. Soybean Hypocotyl Growth Under Field Conditions

Author:: K. H. Knittle; J. S. Burris
Source:: Crop science 1979 v.19 no.1 pp. 37-41
ISSN:: 0011-183X
Subject:: Glycine max; cotyledons; cultivars; genetic variation; hypocotyls; planting date; seed size; seedlings; soil; soybeans
Abstract:: ... In soybeans (Glycine max (L.) Merr.) an epigeal emerger, the sole seedling organ responsible for elevating the cotyledons and epicotyl to the soil surface is the hypocotyl. Yet, soybean seedling and, in particular, hypocotyl growth under field conditions have not been well studied. We measured hypocotyl length and swelling index (mg fresh weight/cm length) of several cultivars and two seed sizes a ...
DOI:: 10.2135/cropsci1979.0011183X001900010009x
: https://doi.org/10.2135/cropsci1979.0011183X001900010009x

81. Soybean Leaf N as Influenced by Seedbed Preparation Methods and Stages of Growth

Author:: J. K. Young; F. D. Whisler; H. F. Hodges
Source:: Agronomy journal 1979 v.71 no.4 pp. 568-573
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; equations; isogenic lines; leaves; maturity stage; montmorillonite; nitrogen; nitrogen fertilizers; plant age; regression analysis; seed development; seedbed preparation; silty clay soils; soybeans; tillage; vegetative growth
Abstract:: ... Recent interest and studies on nitrogen relationships in soybeans [Glycine max (L.) Merrill] have led to a better understanding of the processes regarding N accumulation during vegetative growth and remobilization during seed development. Most of the research work was performed with different N fertilizer treatments and isolines of nodulating and nonnodulating soybeans. Differences in cultural pra ...
DOI:: 10.2134/agronj1979.00021962007100040012x
: https://doi.org/10.2134/agronj1979.00021962007100040012x

82. Soybean Stand Establishment and Yield as Affected by Herbicides and Cultural Practices

Author:: R. R. Johnson; L. M. Wax
Source:: Agronomy journal 1979 v.71 no.5 pp. 880-884
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cold; cultivars; germination; grain yield; greenhouse experimentation; herbicide application; leaves; metribuzin; seed quality; seedbeds; soil; soybeans; stand establishment; vernolate; vigor
Abstract:: ... When reduced soybean (Glycine max (L.) Merr.) stands occur, herbicides are often blamed for the problem. The object of this research was to determine if metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazin-5 (4H)-one] and/or vernolate (S-propyl dipropylthiocarbamate) herbicides interact with other cultural variables to reduce stands and grain yield. Cultural variables researched in the field ...
DOI:: 10.2134/agronj1979.00021962007100050041x
: https://doi.org/10.2134/agronj1979.00021962007100050041x

83. Soybean Water Extraction, Leaf Water Potential, and Evapotranspiration During Drought

Author:: D. C. Reicosky; D. E. Deaton
Source:: Agronomy journal 1979 v.71 no.1 pp. 45-50
ISSN:: 0002-1962
Subject:: Glycine max; soybeans; cultivars; sandy loam soils; drought; leaf water potential; soil matric potential; evapotranspiration; air temperature; water use efficiency
Abstract:: ... Soil water is often the most limiting factor in soybean production in the southeastern US. To increase wateruse efficiency in soybean production, it is necessary to characterize the plant's response to the evaporative demand and to soil water stress when the root distribution changes with depth. ‘Davis’ and ‘McNair 800’ soybean cultivars (Glycine trim (L.) Merr.) were grown in a field experiment c ...
Handle:: 10113/17656
DOI:: 10.2134/agronj1979.00021962007100010011x
: https://doi.org/10.2134/agronj1979.00021962007100010011x

84. Soybean Yields in Relation to Days Between Specific Developmental Stages

Author:: E. J. Dunphy; J. J. Hanway; D. E. Green
Source:: Agronomy journal 1979 v.71 no.6 pp. 917-920
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cultivars; seed development; seed yield; silt; soybeans; Iowa
Abstract:: ... Environment, production practices, and genetic differences are known to influence the number of days between developmental stages of soybeans [Glycine max (L.) Merr.], but the yield response to differences in days between various stages is poorly understood. Twice weekly observations were made on 10 central Iowa replicated field trials over a 3-year period to determine the date that each plot reac ...
DOI:: 10.2134/agronj1979.00021962007100060005x
: https://doi.org/10.2134/agronj1979.00021962007100060005x

85. Afternoon Water Deficits and Grain Yields in Old and New Soybean Cultivars

Author:: J. S. Boyer; R. R. Johnson; S. G. Saupe
Source:: Agronomy journal 1980 v.72 no.6 pp. 981-986
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; canopy; cultivars; leaves; photosynthesis; plant available water; soybeans; Illinois
Abstract:: ... Plant water deficits affect many metabolic processes, and soybean (Glycine max L. Merr.) is subject to water deficits during midday even when soil water is adequate under field conditions. Our objective was to determine if yield improvement by plant breeding has been associated with avoidance of these deficits in soybean. A 3- year experiment was conducted on highly productive soils in central Ill ...
DOI:: 10.2134/agronj1980.00021962007200060028x
: https://doi.org/10.2134/agronj1980.00021962007200060028x

86. Associations of Plant Symptoms and Pod Position with Phomopsis sojae Seed Infection and Damage in Soybean

Author:: P. R. Hepperly; J. B. Sinclair
Source:: Crop science 1980 v.20 no.3 pp. 379-381
ISSN:: 0011-183X
Subject:: Diaporthe phaseolorum var. sojae; Glycine max; USDA; cultivars; fungal diseases of plants; plant pathogenic fungi; seed damage; seed quality; soybeans; stem blight
Abstract:: ... The frequency and severity of infections of Phomopsis sojae (Leh.), pod and stem blight fungus, were inversely related to pod height on soybean [Glycine max (L.) Merr.] plants for the cultivars ‘Chippewa 64’ ‘Hark’, and ‘Wells’. Phomopsis sojae seed damage was primarily found in the bottom third of plants and distribution of damaged seed was heavily skewed to the lowest bearing node. Overall USDA ...
DOI:: 10.2135/cropsci1980.0011183X002000030023x
: https://doi.org/10.2135/cropsci1980.0011183X002000030023x

87. Effect of Field Weathering on the Viability and Vigor of Soybean Seed

Author:: D. M. TeKrony; D. B. Egli; A. D. Phillips
Source:: Agronomy journal 1980 v.72 no.5 pp. 749-753
ISSN:: 0002-1962
Subject:: Glycine max; accelerated aging; air temperature; cultivars; evaporation; germination; manual harvesting; relative humidity; seed moisture; seed weight; soybeans; viability; vigor; water content; weathering
Abstract:: ... The quality of soybean [Glycine max (L.) Merr.] seed at harvest is dependent on the field production environment during development, maturation, and storage on the plant. These investigations were conducted to evaluate the effects of field weathering after physiological maturity (maximum dry seed weight) on seed viability and vigor. Five production environments were compared for two cultivars (‘Cu ...
DOI:: 10.2134/agronj1980.00021962007200050014x
: https://doi.org/10.2134/agronj1980.00021962007200050014x

88. Effect of Planting Dates and Soybean Cultivars on Pod Damage by Corn Earworm

Author:: J. M. Joshi
Source:: Crop science 1980 v.20 no.1 pp. 59-63
ISSN:: 0011-183X
Subject:: Glycine max; Helicoverpa zea; antibiosis; cultivars; planting date; soybeans
Abstract:: ... Eight soybean [Glycine max (L.) Merr.] cultivars during 1974 and 16 cultivars during 1975 and 1976 were planted on five different planting dates with 14-day intervals between each planting to determine which soybean cultivars may escape corn earworm (Heliothis zea Boddie) damage. Soybeans planted by or after told-June generally were more susceptible to corn earworm than the earlier plantings. Each ...
DOI:: 10.2135/cropsci1980.0011183X002000010014x
: https://doi.org/10.2135/cropsci1980.0011183X002000010014x

89. Field Testing Soybeans for Residual Effects of Air Pollution and Seed Size on Crop Yield

Author:: R. K. Howell; L. P. Rose; R. C. Leffel
Source:: Journal of environmental quality 1980 v.9 no.1 pp. 66-68
ISSN:: 0047-2425
Subject:: Glycine max; air pollutants; air pollution; air quality; cultivars; field experimentation; planting; residual effects; seed size; seed yield; seeds; soybeans; Maryland
Abstract:: ... Mean seed weights (g/100 seeds) for four soybean [Glycine max (L.) Merr.], cultivass grown in 1973 and 1974 in cylindrical open-top field chambers that provided carbon-filtered air were significantly greater (17.2) than from plants grown in nonfiltered air in chambers (15.1), or in conventional plots without chambers (15.7). Using this seed, an experiment was designed to answer three questions: (i ...
DOI:: 10.2134/jeq1980.00472425000900010016x
: https://doi.org/10.2134/jeq1980.00472425000900010016x

90. Foliar Fertilization of Soybeans: Absorption and Translocation of 15N-Labeled Urea

Author:: B. L. Vasilas; J. O. Legg; D. C. Wolf
Source:: Agronomy journal 1980 v.72 no.2 pp. 271-275
ISSN:: 0002-1962
Subject:: Glycine max; absorption; agronomy; cultivars; foliar application; nitrogen fertilizers; nutrient uptake; potassium; potassium sulfate; soybeans; total nitrogen; urea; yields
Abstract:: ... AsbtractFoliar fertilization offers a possible means of increasing soybean (Glycine max (L.) Merr.] yields, but little is known of the utilization efficiency of foliarapplied nutrients. Field experiments were conducted in 1976 and 1917 to determine percentage recovery of foliar applied ¹⁵N-labeled urea by soybeans and translocation of ¹⁵N within the plant. Foliar treatments containing N, P, K, S o ...
DOI:: 10.2134/agronj1980.00021962007200020006x
: https://doi.org/10.2134/agronj1980.00021962007200020006x

91. Imbibitional Chilling Injury in Soybean Axes: Relationship to Stelar Lesions and Seasonal Environments

Author:: E. N. Ashworth; R. L. Oberdorf
Source:: Agronomy journal 1980 v.72 no.6 pp. 923-928
ISSN:: 0002-1962
Subject:: Glycine max; agronomy; cold; cultivars; germination; hypocotyls; imbibition; seedling growth; soybeans; stele; water content
Abstract:: ... The increasing use of isolated embryonic axes as experimental issues for studies on early germination events warrants an evaluation of stress effects during hydration. The objectives were to evaluate embryonic axis growth and stress crack formation in soybean (Glycine max (L.) Merr.) seeds and isolated axes resulting from hydrational stresses of cold temperatures and low tissue moisture. Sensitivi ...
DOI:: 10.2134/agronj1980.00021962007200060015x
: https://doi.org/10.2134/agronj1980.00021962007200060015x

92. Influence of Cultivar, Between-row Spacing, and Plant Population of Fixation of Soybean

Author:: A. B. Bello; W. A. Ceron-Diaz; C. D. Nickell; E. O. El Sherif; L. C. Davis
Source:: Crop science 1980 v.20 no.6 pp. 751-755
ISSN:: 0011-183X
Subject:: Glycine max; acetylene reduction; cultivars; filling period; growth habit; nitrogen; nitrogen fixation; planting date; seed yield; soil; soybeans; total nitrogen; Kansas
Abstract:: ... An evaluation of the seasonal trends in nitrogen fixation by three soybean [Glycine max (L.) Merr.] cultivars differing in growth habits was made at two locations in Kansas. Two planting dates—May and June; two row spacings—38 cm and 76 cm—and two plant populations— 380,000 and 760,000 plants/ha were examined. Root samples were assayed weekly for acetylene reduction commencing from 3 weeks after p ...
DOI:: 10.2135/cropsci1980.0011183X002000060018x
: https://doi.org/10.2135/cropsci1980.0011183X002000060018x

93. Influence of Induced Lodging on Pod Distribution and Seed Yield in Soybeans

Author:: Ramli Bin Mohd Noor; C. E. Caviness
Source:: Agronomy journal 1980 v.72 no.6 pp. 904-906
ISSN:: 0002-1962
Subject:: Glycine max; branches; cultivars; flowering; lodging; men; pods; seed size; seed yield; seeds; soybeans; vegetative growth; Arkansas
Abstract:: ... Lodging occurs frequently in soybeans [Glycine max (L.) Men.] and has been shown to reduce yields of indeterminate cultivars under most conditions: Information is limited on effects of lodging on determinate cultivars, types commonly grown in the southern U. S. Influence of lodging on pod distribution and seed yield was measured during a 2-year study in the field on ‘Forrest’, a determinate cultiv ...
DOI:: 10.2134/agronj1980.00021962007200060010x
: https://doi.org/10.2134/agronj1980.00021962007200060010x

94. Inheritance of an Acid Phosphatase and Its Linkage with the Kunitz Trypsin Inhibitor in Seed Protein of Soybeans

Author:: D. F. Hildebrand; J. H. Orf; T. Hymowitz
Source:: Crop science 1980 v.20 no.1 pp. 83-85
ISSN:: 0011-183X
Subject:: Glycine max; Kunitz-type proteinase inhibitor; acid phosphatase; cultivars; electrophoresis; genotype; loci; soybeans
Abstract:: ... A soybean [Glycine max (L.) Merrill] seed acid phosphatase exists in the gennplasm in three different electro-phoretic forms. These electrophoretic forms are inherited as codominant alleles at a single locus. The symbol Apᵃ is assigned to the slow (Rf 0.38) form, Apᵇ to the intermediate (Rf 0.42), and Apᶜ to the fast (Rf 0.47) form. Of the 326 cultivars examined, 4 were of the Apᵃ genotype, 296 of ...
DOI:: 10.2135/cropsci1980.0011183X002000010019x
: https://doi.org/10.2135/cropsci1980.0011183X002000010019x

95. Inheritance of β-Amylase Nulls in Soybean Seed

Author:: D. F. Hildebrand; T. Hymowitz
Source:: Crop science 1980 v.20 no.6 pp. 727-730
ISSN:: 0011-183X
Subject:: Castanea; Glycine max; alleles; beta-amylase; cultivars; electrophoresis; enzyme activity; genotype; men; reciprocal crosses; soybeans
Abstract:: ... The soybean [Glycine max (L.) Men.] cultivar ‘Altona’ lacks β-amylase activity (AM null 1) and the Sp₁ᵇ seed protein electrophoretic band. Altona also has a genotype with β-amylase activity and the Sp₁ᵇ band (Rf 0.42). The cultivar ‘Chestnut’ lacks detectable β-amylase activity (AM null 2), but it produces the Sp₁ᵃ seed protein electrophoretic band (Rf 0.36). Seed from reciprocal crosses of Altona ...
DOI:: 10.2135/cropsci1980.0011183X002000060012x
: https://doi.org/10.2135/cropsci1980.0011183X002000060012x

96. Methanol Stress as a Test of Seed Vigor

Author:: M. E. Musgrave; D. A. Priestley; A. C. Leopold
Source:: Crop science 1980 v.20 no.5 pp. 626-630
ISSN:: 0011-183X
Subject:: Glycine max; Pisum sativum; chlorophyll; cultivars; cyanide-sensitive respiration; germination; methanol; soybeans; vigor
Abstract:: ... A pre-germination treatment of seeds with methanolwater solutions is shown to mimic the effects of the accelerated aging treatment of soybeans (40 C, 100% RH). Similarities in germination data are presented for accelerated aging and methanol stress of peas (Pisum sativum L. cv. Alaska) and 7 cultivars of soybean [Glycine max (L.) Merr.]. Methanol stress is shown to bring about physiological lesion ...
DOI:: 10.2135/cropsci1980.0011183X002000050020x
: https://doi.org/10.2135/cropsci1980.0011183X002000050020x

97. Phenotypic Thermal Stability of Rhizobitoxine-induced Chlorosis and the Nodulation Controlling Gene, rj

Author:: T. E. Devine; B. H. Breithaupt
Source:: Crop science 1980 v.20 no.3 pp. 394-396
ISSN:: 0011-183X
Subject:: Bradyrhizobium japonicum; Glycine max; chlorosis; cultivars; genes; greenhouses; jars; nodulation; phenotype; propanolamines; soybeans; temperature; vermiculite
Abstract:: ... The rj₁ gene in soybeans (Glycine max L Merrill), prevents nodulation with a broad range of strains of Rhizobium japonicum. Strains of R. japonicum that produce rhizobitoxine induced foliar chlorosis can nodulate rj₁ plants in sand or vermiculite culture in the greenhouse. This study was undertaken to determine the effects of temperature on the expression of chlorotic symptoms and nodulation of rj ...
DOI:: 10.2135/cropsci1980.0011183X002000030029x
: https://doi.org/10.2135/cropsci1980.0011183X002000030029x

98. Residual Effects of MSMA on Sterility in Rice Cultivars

Author:: J. T. Gilmour; B. R. Wells
Source:: Agronomy journal 1980 v.72 no.6 pp. 1066-1067
ISSN:: 0002-1962
Subject:: Albaqualfs; Glycine max; MSMA (herbicide); Oryza sativa; arsenic; crop production; crop rotation; cultivars; drying; herbicide residues; herbicide resistance; plant fertility; residual effects; rice; silt loam soils; soybeans; water management
Abstract:: ... In a study conducted in 1975, sterility in rice (Oryza sativa L.) cultivars grown on Crowley silt loam soil (Typic Albaqualf) amended with monosodium methanearsonate (MSMA) increased as cultivar susceptibility to straight-head increased. A midseason drain and dry treatment was found to decrease MSMA induced sterility. This study was a continuation of the experiment initiated in 1975 to evaluate th ...
DOI:: 10.2134/agronj1980.00021962007200060049x
: https://doi.org/10.2134/agronj1980.00021962007200060049x

99. Response of Soybean Cultivars to Planting Patterns

Author:: J. A. Costa; E. S. Oplinger; J. W. Pendleton
Source:: Agronomy journal 1980 v.72 no.1 pp. 153-156
ISSN:: 0002-1962
Subject:: Glycine max; acreage; cultivars; field experimentation; grain yield; herbicides; latitude; leaf area index; lodging; lodging resistance; maturity groups; new variety; planting; production technology; row spacing; seed weight; seed yield; soil; soybeans; Wisconsin
Abstract:: ... Since soybean [Glycine max (L) Merr.] acreage continues to increase in the higher latitudes of the world the objective was to obtain agronomic information on the effect of inter and intra-row spacings on several of the most widely grown, early cultivars in America. Ten soybean cultivars differing in maturity (Group 0 through II) and growth characteriscia were grown in two row spacings (27-cm and 7 ...
DOI:: 10.2134/agronj1980.00021962007200010029x
: https://doi.org/10.2134/agronj1980.00021962007200010029x

100. Seasonal Variation in the Performance of Soybeans in Hawaii

Author:: Benjamin H. Beard; James C. Gilbert; Terry Sekioka
Source:: Crop science 1980 v.20 no.2 pp. 163-165
ISSN:: 0011-183X
Subject:: Glycine max; Hawaii; cultivars; germplasm; seasonal variation; soybeans
Abstract:: ... Our objectives were to determine the variation in yield and other characteristics of soybeans (Glycine max (L.) Merr.) grown in Hawaii. We were especially interested in finding the best adapted cultlvars for planting during the winter months to use as parental germplasm for cultivar improvement. Soybean cultivars were grown at three locations in Hawaii in each month of the year, except July and De ...
DOI:: 10.2135/cropsci1980.0011183X002000020003x
: https://doi.org/10.2135/cropsci1980.0011183X002000020003x

PubAg

Main content area

Limit your search

Text Availability

Associated Data

Journal

Publication Year

Subject

Search

2,752 Search Results

Search Results

1. The percentage of nitrogen in different parts of soybean plants at different stages of growth

2. Inheritance of resistance of soybeans to Peronospora manshurica

3. Physiologic races of Peronospora manshurica on soybeans

4. Resistance in Soybeans, Glycine Max L,. Merr., to the Reniform Nematode

5. Soybean Cultivars: Acute Foliar Response to Ozone

6. Effect of Multiple Applications of 2,3,5-Triiodobenzoic Acid (TIBA) on Yields of Stormproof and Nonstormproof Cotton

7. Effect of Seed Maturation and Plant Population on Soybean Seed Quality

8. The Effects of Herbicides on Soybean Seed Constituents

9. Evaluation of Intergenotypic Competition with a Paired-Row Technique

10. Forage Potential of Soybean Straw

11. Interaction of Selected Pesticides and Rhizobium japonicum in Pure Culture and Under Field Conditions

12. Effect of Planted Seed Size on Emergence and Yield of Soybeans (Glycine Max (L.) Merr.)

13. Influence of Between and Within-Row Spacing on Agronomic Characteristics of Irrigated Soybeans

14. Nitrate Uptake Effectiveness of Four Plant Species

15. Effect of Honey Bees on Yield of Three Soybean Cultivars

16. Effects of B Application on Soybean Yield, Chemical Composition, and Related Characteristics

17. Estimation of Leaflet, Trifoliolate, and Total Leaf Areas of Soybeans

18. Inheritance of Reaction to Race 4 of Soybean-cyst Nematode

19. Variability of Floral Characteristics Influences Honey Bee Visitation to Soybean Blossoms

20. Effect of Planting Depth, Temperature, and Cultivars on Emergence and Yield of Double Cropped Soybeans

21. Evidence of Inheritance of Resistance to the Mexican Bean Beetle in Soybeans

22. Foliar Fertilization of Soybeans During the Seed-filling Period

23. Influence of Terminal Bud Removal on the Growth and Seed Yield of Soybeans

24. Inheritance of Sensitivity to Metribuzin in Soybeans

25. Leaf-feeding Resistance to Bollworm and Tobacco Budworm in Three Soybean Plant Introductions

26. Manganese Deficiency and Toxicity Levels for ‘Bragg’ Soybeans

27. Reflectant Induced Modification of Soybean Canopy Radiation Balance IV. Leaf and Canopy Temperature

28. Response of Soybeans in Maturity Groups V, VI, VII, and VIII to End-trimming

29. Screening Soybeans for Tolerance to Metribuzin

30. Water-soluble Carbohydrate Accumulation in Soybean Plants

31. Components of Developing Soybean Seeds: Oil, Protein, Sugars, Starch, Organic Acids, and Amino Acids

32. Degrees of Differentiation Obtained in Tissue Cultures of Glycine Species

33. Distribution of Sugars in the Soybean Embryo

34. Effect of Soil Al Saturation on Nutrient Concentration of Soybean Tops, Roots, and Nodules

35. Genetic Improvement in Yield of Soybeans

36. Influence of Simulated Early Lodging upon Soybean Seed Yield and its Components

37. Inheritance of a Brachytic Character in Soybeans

38. Leaf Area and CO2-exchange Rate as Determinants of the Rate of Vegetative Growth in Soybean Plants

39. Leaf Photosynthetic Characteristics of Determinate Soybean Cultivars

40. Resistance of selected Soybean Genotypes and Segregating Populations to Cabbage Looper Feeding

41. Response of Indeterminate and Determinate Soybean Cultivars to Defoliation and Half-plant Cut-off

42. Response of Soybean Cultivars to Narrow Rows and Planting Rates Under Weed-free Conditions

43. Response of Soybeans to Overseeding Followed by Plant Thinning at Various Growth Stages

44. Response of Wheat Cultivars to Liming in Some High Al Oxisols of Rio Grande do Sul, Brazil

45. Yield and Leaf Nitrogen of Nodulating and Nonnodulating Soybeans as Affected by Nitrogen and Molybdenum

46. Aluminum Tolerance of Soybean Cultivars Based on Root Elongation in Solution Culture Compared with Growth in Acid Soil

47. Effect of Day and Night Temperatures During Floral Induction on Morphology of Soybeans

48. Effect of Plant Population on Yield and Height Characteristics in Determinate Soybeans

49. Effects of Environment and Management on Soybean Performance in the Tropics

50. Flowering, Abortion, and Yield of Early-Maturing Soybeans at Three Densities

51. Influence of Soybean Seed Size and Position on the Rate and Duration of Filling

52. Irrigation Effects on Vegetative and Reproductive Development of Three Soybean Cultivars

53. Management of Irrigated Soybeans on a Moderately Coarse-textured Soil in the Upper Midwest

54. Photosynthetically Active Radiation, CO2 Uptake, and Stomatal Diffusive Resistance Profiles Within Soybean Canopies

55. Reproductive Advantage Associated with Resistance to Soybean-Cyst Nematode

56. Response of Soybeans to Commercial Soil-Applied Inoculants

57. Soybean Response to Selected Rice Herbicides

58. Soybean Root Growth during the Reproductive Stages of Development

59. Differential Cultivar Tolerance in Soybean to Phytotoxic Levels of Soil Zn. I. Range of Cultivar Response

60. Differential Cultivar Tolerance in Soybean to Phytotoxic Levels of Soil Zn. II. Range of Zn Additions and the Uptake and Translocation of Zn, Mn, Fe, and P

61. Effect Upon Soybean Cultivar Bragg, When P is Band-concentrated Upon Variable Soil-Available P

62. Effect of Downward Force on Soybean Hypocotyl Growth

63. Elongation Force of Seedlings of Leguminous Crops

64. Evaluation of Vigor Tests in Soybean Seeds: Relationship of ATP, Conductivity, and Radioactive Tracer Multiple Criteria Laboratory Tests to Field Performance

65. Field Assessment of Air Pollution-induced Soybean Yield Losses

66. Gaseous Nitrogen Loss from Soybean Foliage

67. Genetic Variabilty for Resistance to Propanil Injury in Soybeans

68. Harvest Index of Soybeans as Affected by Planting Date and Maturity Rating

69. Identification of Multiple Insect Resistant Soybean Lines