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You searched for: Subject cultivars Remove constraint Subject: cultivars Subject Glycine max Remove constraint Subject: Glycine max
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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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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