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1. Agronomic and Economic Response of Three Tropical Legumes to Lime and Phosphorus in an Acid Infertile Spodosol

Author:
Snyder, G. H.; Kretschmer, A. E.; Alvarez, J.
Source:
Agronomy journal 1985 v.77 no.3 pp. 427-432
ISSN:
0002-1962
Subject:
acid soils; Aeschynomene americana; Desmodium; liming; Macroptilium atropurpureum; pastures; superphosphate; yields; Florida
Abstract:
... Numerous potential benefits have been cited for the inclusion of tropical legumes in pastures, but few commercial successes have been realized. Information is needed on even the most basic aspects of tropical legume culture. The study herein was designed to determine rates of lime and P for maximum yield of three tropical legumes, and to estimate the rates resulting in maximum economic return unde ...
DOI:
10.2134/agronj1985.00021962007700030017x

2. Biomass and Sugar Yield Response of Sweet Sorghum to Lime and Fertilizer

Author:
Soileau, John M.; Bradford, B. N.
Source:
Agronomy journal 1985 v.77 no.3 pp. 471-475
ISSN:
0002-1962
Subject:
Sorghum bicolor; acid soils; fertilizers; liming; yields; biomass; sugars; energy crops; Alabama
Abstract:
... Soil fertility requirements for sweet sorghum [Sorghum bicolor (L.) Moench] as an alcohol fuel crop have not been well defined. The primary objective of this study was to determine the biomass and sugar (% Brix ✕ extracted juice) yield response of sweet sorghum to N-P-K and lime. The study was conducted for 2 years on a Wynnville silt loam (fine-loamy, siliceous, thermic Glossic Fragiudult) soil i ...
DOI:
10.2134/agronj1985.00021962007700030025x

3. Cicer Milkvetch and Alfalfa as Influenced by Two Cutting Schedules

Author:
Gabrielsen, B. C.; Smith, D. H.; Townsend, C. E.
Source:
Agronomy journal 1985 v.77 no.3 pp. 416-422
ISSN:
0002-1962
Subject:
Astragalus cicer; Medicago sativa; harvest date; forage crops; yields; protein composition; Colorado
Abstract:
... Cicer milkvetch (Astragalus cicer L.) is a promising forage legume, but little is known about its response to cutting. A 2-year study was conducted at Fort Collins, CO, on a Nunn clay loam (fine, montmorillonitic, mesic Aridic Argiustoll) soil to compare yield, quality, and trends in carbohydrate reserves of cicer milkvetch and alfalfa (Medicago sativa L.) in response to annual three- and four-cut ...
DOI:
10.2134/agronj1985.00021962007700030015x

4. Continuous Tillage and Rotation Combinations Effects on Corn, Soybean, and Oat Yields

Author:
Dick, W. A.; Van Doren, D. M.
Source:
Agronomy journal 1985 v.77 no.3 pp. 459-465
ISSN:
0002-1962
Subject:
Zea mays; Glycine max; Avena sativa; minimum tillage; crop rotation; continuous cropping; yields; long term experiments; Ohio
Abstract:
... Few studies report long-term effects of various tillage and crop rotation practices. Studies were conducted to compare the relative ability of various tillage and crop rotation combinations (3 ✕ 3 factorial) to sustain corn (Zea mays L.), soybean (Glycine mar L.), and oat (Avena sativa L.) yields. The tillage and rotation combinations were continuously applied for more than 20 years to a well-drai ...
DOI:
10.2134/agronj1985.00021962007700030023x

5. Corn Growth and Yield Response to Ethylene Dibromide and Nitrogen

Author:
Touchton, J. T.; Rodriguez-Kabana, R.
Source:
Agronomy journal 1985 v.77 no.3 pp. 389-392
ISSN:
0002-1962
Subject:
Zea mays; ethylene dibromide; nematicides; nitrogen fertilizers
Abstract:
... Even in fields where parasitic nematode populations are low, ethylene dibromide (EDB) will often result in improved plant growth and yields. Visual growth responses to EDB are similar to responses obtained from N fertilizer. The purpose of this field study, which was conducted for 2 years on two Coastal Plain soils (Plinthic Paleudults), was to determine if corn [Zea mays (L.)] growth, nutrient up ...
DOI:
10.2134/agronj1985.00021962007700030009x

6. Critical Levels of Manganese in Soybean Leaves at Various Growth Stages

Author:
Mascagni, H. J.; Cox, F. R.
Source:
Agronomy journal 1985 v.77 no.3 pp. 373-375
ISSN:
0002-1962
Subject:
Glycine max; leaves; manganese; deficiency diseases
Abstract:
... Manganese deficiency in soybeans [Glycine max (L.) Merr.] is a common problem in the Atlantic Coastal Plain. Leaf Mn concentration may be used to diagnose this disorder. For plant analyses to be effective, critical levels need to be established at different growth stages. Data from 38 experiment-year field rate studies were used to relate leaf Mn concentration at the R2 growth stage to yield respo ...
DOI:
10.2134/agronj1985.00021962007700030005x

7. Dinitrogen Fixation by Soybeans in Alabama

Author:
Thurlow, D. L.; Hiltbold, A. E.
Source:
Agronomy journal 1985 v.77 no.3 pp. 432-436
ISSN:
0002-1962
Subject:
Glycine max; nitrogen fixation; Alabama
Abstract:
... The contribution of symbiotic N₂ fixation to total N and yield of soybeans [Glycine max (L.) Merr.] ranges widely among soils and cultural conditions. Utilization of nonnodulating soybean isolines and ¹⁵N-dilution techniques has provided estimates of fixation in indeterminate cultivars on soils of relatively high N supply. Few estimates are available, however, for determinate soybeans on low N soi ...
DOI:
10.2134/agronj1985.00021962007700030018x

8. Dris Norms for 11 Nutrients in Corn Leaves

Author:
Elwali, A. M. O.; Gascho, G. J.; Sumner, M. E.
Source:
Agronomy journal 1985 v.77 no.3 pp. 506-508
ISSN:
0002-1962
Subject:
plant nutrition; Zea mays; fertilizers; nutrient requirements; Diagnosis and Recommendation Integrated System; Georgia
DOI:
10.2134/agronj1985.00021962007700030032x

9. Effective Rates of Fertilization for Correcting Manganese Deficiency in Soybeans

Author:
Mascagni, H. J.; Cox, F. R.
Source:
Agronomy journal 1985 v.77 no.3 pp. 363-366
ISSN:
0002-1962
Subject:
Glycine max; deficiency diseases
Abstract:
... Manganese deficiencies occur in soybeans (Glycine max L.) grown on slightly acid to alkaline soils in the Atlantic Coastal Plain and efficient, effective corrective measures are needed. The optimum rate of Mn needed is not well defined for any method of application. Field studies were conducted to establish the most efficient rate for broadcast and band methods of soil application and for foliar a ...
DOI:
10.2134/agronj1985.00021962007700030003x

10. Effect of N Fertilization on Earthworm and Microarthropod Populations in Kentucky Bluegrass Turf

Author:
Potter, Daniel A.; Bridges, Barry L.; Gordon, F. Carter
Source:
Agronomy journal 1985 v.77 no.3 pp. 367-372
ISSN:
0002-1962
Subject:
soil fauna; Oligochaeta; lawns and turf; thatch; nitrogen fertilizers; soil pH
Abstract:
... Earthworms and microarthropods are abundant in turfgrass and may be important to thatch decomposition and nutrient recycling. There is little published information concerning the effects of cultural practices on the soil fauna in turf. The purpose of this study was to determine the influence of prolonged N fertilization on populations of earthworms, Collembola, and Acari involved h decomposition p ...
DOI:
10.2134/agronj1985.00021962007700030004x

11. Effect of Soil Temperature and Inoculum Rate on the Recovery of Three Introduced Strains of Rhizobium japonicum

Author:
Kvien, C. S.; Ham, G. E.
Source:
Agronomy journal 1985 v.77 no.3 pp. 484-489
ISSN:
0002-1962
Subject:
Glycine max; cultivars; Bradyrhizobium japonicum; strains; soil temperature; inoculum; nodulation
Abstract:
... In order to determine the effect of soil temperature on inoculum recovery within soybean [Glycine max (L.) Merr.] nodules, an experiment consisting of four soil temperatures (15, 20, 25, and 30 °C), four soybean lines (Hodgson, Steele, ISZ.7, and 257.428), four inoculation rates (0,3 × 10⁷, 1.5 × 10⁸, and 3.0 × 10⁸ cells/pot) and replicated four times was conducted in a controlled environmental ch ...
DOI:
10.2134/agronj1985.00021962007700030028x

12. Effect of Wheat Residue Management on Continuous Production of Irrigated Winter Wheat

Author:
Undersander, D. J.; Reiger, Cecil
Source:
Agronomy journal 1985 v.77 no.3 pp. 508-510
ISSN:
0002-1962
Subject:
Triticum aestivum; burning; clay loam soils; crop residue management; energy; furrow irrigation; furrows; grain yield; infiltration (hydrology); long term effects; soil organic matter; soil water; straw; wages and remuneration; winter wheat; Texas
Abstract:
... Where furrow irrigation is practiced, the residue from the previous crop must be removed from the soil surface to prevent furrow blockage, resulting in disuniform irrigation. High energy and labor costs have caused some producers to consider burning the residue rather than incorporating it. Thus, a 14-year study was conducted on a clay loam soil (fine, mixed, mesic Torrertic Paleustall) in north T ...
DOI:
10.2134/agronj1985.00021962007700030033x

13. Excess Soil Water and Phytophthora Root Rot Stresses of Phytophthora Root Rot Sensitive and Resistant Alfalfa Cultivars

Author:
Alva, A. K.; Lanyon, L. E.; Leath, K. T.
Source:
Agronomy journal 1985 v.77 no.3 pp. 437-442
ISSN:
0002-1962
Subject:
Medicago sativa; Phytophthora; alfalfa; cultivars; porcine reproductive and respiratory syndrome; root growth; root rot; roots; shoots; soil water; toxicity; water stress
Abstract:
... The adaptation of alfalfa (Medicago sativa L.) to well-drained soil has limited its range of culture. The poor performance of this crop in wet soils has often been attributed to the effects of Phytophthora root rot (PRR). However, excess soil water itself may reduce alfalfa growth. The impact of continuous excess soil water stress (ESWS) and PRR stress (PRRS) and the growth potential after elimina ...
DOI:
10.2134/agronj1985.00021962007700030019x

14. Grain Yield and Yield Components of Soft Red Winter Wheat as Affected by Management Practices

Author:
Frederick, J. R.; Marshall, H. G.
Source:
Agronomy journal 1985 v.77 no.3 pp. 495-499
ISSN:
0002-1962
Subject:
tillage; Triticum aestivum; nitrogen fertilizers; row spacing; yields; Pennsylvania
Abstract:
... The use of intensive management practices could substantially increase soft red winter wheat (Triticum aestivum L. em Thell.) grain yields in the northeastern USA, but more information is needed about the influence of management factors on components of yield. Our objective was to determine the effects of seeding rate, row spacing, seeding depth, and rate of spring-applied N fertilizer on grain yi ...
DOI:
10.2134/agronj1985.00021962007700030030x

15. Influence of Soil Compaction on Trifluralin Phytotoxicity to Corn

Author:
Martin, Andrew G.; Jordan, Thomas N.; Steinhardt, Gary C.
Source:
Agronomy journal 1985 v.77 no.3 pp. 481-483
ISSN:
0002-1962
Subject:
Zea mays; soil compaction; soil water content; herbicides; phytotoxicity; United States
Abstract:
... Little work has been published in the United States on the influence of soil compaction on increased herbicide phytotoxicity to crop seedling development. Yet, soil compaction on agricultural lands is an increasing problem, especially on certain soil types in the eastern Corn Belt region of the nation. In greenhouse studies, the effects of soil compaction of an Ockley silt loam (fine, silty, mixed ...
DOI:
10.2134/agronj1985.00021962007700030027x

16. Nitrification Inhibitor Evaluation on Cotton. II. Inhibitor Incorporation Depth and N Placement

Author:
York, A. C.; Tucker, M. R.
Source:
Agronomy journal 1985 v.77 no.3 pp. 407-411
ISSN:
0002-1962
Subject:
Gossypium hirsutum; nitrogen fertilizers; nitrification inhibitors; North Carolina
Abstract:
... The use of nitrification inhibitors (NIs) in the Southeast has given inconsistent results. Because application techniques may afTect the efficacy of NIs, a 3-year experiment with cotton (Gossypium hirsutum L.) was conducted on a sandy, low organic matter soil (Arenic Paleudults) to evaluate the efficacy of etridiazol [5-ethoxy-3-(trichloromethyl)-1,2,4-thiadiazole] and nitrapyrin [2-chloro-6-(tric ...
DOI:
10.2134/agronj1985.00021962007700030013x

17. Nitrification Inhibitor Evaluation on Cotton. I. Rate and Time of N Application

Author:
York, A. C.; Tucker, M. R.
Source:
Agronomy journal 1985 v.77 no.3 pp. 403-406
ISSN:
0002-1962
Subject:
coastal plains; fertilizer application; Gossypium hirsutum; nitrification inhibitors; nitrogen; North Carolina
Abstract:
... Most cotton (Gossypium hirsutum L.) in the southeastern USA is grown on sandy soils that are subject to extensive N leaching. Split applications of N are normally utilized to reduce leaching losses. Even with split applications, however, leaching can still subject the crop to periods of N deficiency which can lead to yield reductions. Experiments were conducted at three sites (Typic and Plinthic P ...
DOI:
10.2134/agronj1985.00021962007700030012x

18. Phosphorus Efficiency and Phosphate-Iron Interaction in Maize

Author:
Elliott, George C.; Læuchli, André
Source:
Agronomy journal 1985 v.77 no.3 pp. 399-403
ISSN:
0002-1962
Subject:
Zea mays; phosphorus fertilizers; iron; absorption; nutrient transport; deficiency diseases; genotype
Abstract:
... Genotypic differences in absorption or utilization of P might be exploited to improve efficiency of fertiliir use or to obtain higher productivity on P-deficient soils. Experiments were conducted to determine rates of P absorption, P accumulation, and P utilization in 15 inbred genotypes of maize (Zea mays L.) at 3 P supply levels. Nutrient solution P concentrations were maintained at approximatel ...
DOI:
10.2134/agronj1985.00021962007700030011x

19. Phosphorus Relationships in Potato Plants

Author:
Westermann, D. T.; Kleinkopf, G. E.
Source:
Agronomy journal 1985 v.77 no.3 pp. 490-494
ISSN:
0002-1962
Subject:
Solanum tuberosum; phosphorus fertilizers; tubers; yields; Idaho
Abstract:
... Maximum potato (Solanum tuberosum L.) tuber yields occur when an active plant canopy is maintained until normal plant maturation. Plant nutrient concentrations and uptake rates play a major role in maintaining an active plant top. The objectives of this study were to relate the plant P concentrations to the P and dry matter balance between tuber and total plant growth needs. Growth analysis data, ...
DOI:
10.2134/agronj1985.00021962007700030029x

20. Physiological Response of Meadowfoam to Crop Water Deficits

Author:
Pearson, C. H.; Jolliff, G. D.
Source:
Agronomy journal 1985 v.77 no.3 pp. 422-426
ISSN:
0002-1962
Subject:
transpiration; water stress; oil crops; Limnanthes alba; Oregon
Abstract:
... Meadowfoam (Limnanthes alba Benth.), a new oilseed crop, is adapted to wet meadows in its native habitat. The effect of plant water stress during seed development has not been reported, but was postulated as a cause of seed yield variation in cultivated fields. The objective of this field study was to characterize meadowfoam response to water stress. Treatments included: No irrigation (control); e ...
DOI:
10.2134/agronj1985.00021962007700030016x

21. Potassium Fertilization of Alfalfa Grown on a Soil High in Potassium

Author:
Barbarick, K. A.
Source:
Agronomy journal 1985 v.77 no.3 pp. 442-445
ISSN:
0002-1962
Subject:
Medicago sativa; cultivars; potassium fertilizers; Colorado
Abstract:
... Most Colorado soils contain adequate levels of plant-available K. This study investigated the influence of up to 750 kg K ha⁻¹ on four semidormant varieties of alfalfa (Medicago sativa L.) grown on a soil high in K (Nunn clay loam—Aridic Argiustoll) over 4 years. Fertilizer K significantly increased dry matter yield for the first 2 years and significantly increased the total alfalfa yields for the ...
DOI:
10.2134/agronj1985.00021962007700030020x

22. Potato Tubers and Soil Aeration

Author:
Cary, J. W.
Source:
Agronomy journal 1985 v.77 no.3 pp. 379-383
ISSN:
0002-1962
Subject:
Solanum tuberosum; aeration; bulk density; diffusivity; ethylene; loamy sand soils; nitrogen; oxygen; oxygen consumption; oxygen requirement; periderm; permeability; potatoes; roots; silt loam soils; silty clay soils; soil quality; soil respiration; texture; tubers
Abstract:
... Potato plants are more sensitive to soil oxygen stress than many other common crops. Some recent literature suggests this may be due to a relatively high oxygen requirement for tuber growth, rather than a greater requirement for the roots per se. Consequently, the oxygen consumption of growing potato tubers (Solanum tuberosum cv. Russet Burbank) was measured in the field on a Portneuf silt loam (c ...
DOI:
10.2134/agronj1985.00021962007700030007x

23. Row Spacing, Plant Population, and Water Management Effects on Corn in the Atlantic Coastal Plain

Author:
Karlen, D. L.; Camp, C. R.
Source:
Agronomy journal 1985 v.77 no.3 pp. 393
ISSN:
0002-1962
Subject:
coastal plains; irrigation; plant density; row spacing; water allocation; Zea mays; South Carolina
Abstract:
... Lack of water because of erratic rainfall frequently limits corn (L.) production on Typic Paleudults in the Atlantic Coastal Plain. Traditionally, wide (96 cm) row spacing and low plant population have been used to prevent water stress, but recently landowners have begun to invest in irrigation systems. Changes in row spacing, plant population, or fertilization practices may be required to achieve ...
Handle:
10113/17743
DOI:
10.2134/agronj1985.00021962007700030010x

24. Salt Effects on Seedling Growth and Ion Uptake of Three Pecan Rootstock Cultivars

Author:
Miyamoto, S.; Gobran, G. R.; Piela, K.
Source:
Agronomy journal 1985 v.77 no.3 pp. 383-388
ISSN:
0002-1962
Subject:
Carya illinoinensis; cultivars; ion transport; irrigated farming; salt tolerance; seedlings; salinity; water quality; saline water
Abstract:
... Salt damage is often reported in irrigated cultivation of pecans (Carya illinoensis K.), yet little is known about the concentration or the salt element present in soils, which causes the damage. This study was conducted to evaluate the effects of salinity, Na and Cl on growth and ion uptake of pecan seedlings used as rootstock. The seedlings of three cultivars (‘Apache’, ‘Burkett’, and ‘Riverside ...
DOI:
10.2134/agronj1985.00021962007700030008x

25. Soyphen: Soybean Growth Stages Modeled from Temperature, Daylength, and Water Availability

Author:
Hodges, Tom; French, Vikki
Source:
Agronomy journal 1985 v.77 no.3 pp. 500-505
ISSN:
0002-1962
Subject:
Glycine max; developmental stages; models; computer software
DOI:
10.2134/agronj1985.00021962007700030031x

26. Sweet Potato Response to K and P Fertilization

Author:
Nicholaides, J. J.; Chancy, H. F.; Mascagni, H. J.; Wilson, L. G.; Eaddy, D. W.
Source:
Agronomy journal 1985 v.77 no.3 pp. 466-470
ISSN:
0002-1962
Subject:
coastal plains; Ipomoea batatas; phosphorus fertilizers; potassium fertilizers; North Carolina
Abstract:
... Limited literature is available to provide recommendations of K source and rate and P rate for sweet potato [Ipomoea batatas (L.) Lam.] production. Many growers, therefore, continue to use the more expensive sulfate (SO₄) source of K rather than chloride (Cl) and higher than recommended rates of K and P. Accordingly, on-farm experiments were conducted during 3 years on North Carolina Paleudults to ...
DOI:
10.2134/agronj1985.00021962007700030024x

27. Tall Fescue Response to Plant Growth Retardants and Fertilizer Sources

Author:
McCarty, L. B.; DiPaola, J. M.; Lewis, W. M.; Gilbert, W. B.
Source:
Agronomy journal 1985 v.77 no.3 pp. 476-480
ISSN:
0002-1962
Subject:
Festuca arundinacea; lawns and turf; range management; fertilizers; growth retardation; growth regulators; North Carolina
Abstract:
... Plant growth retardant applications have been reported to reduce mowing requirements of tall fescue (Festuca arundinacea. Schreb.), but turf response to retardants under various fertility regimes has not been adequately explored. The objective of this study was to evaluate the effects of three spring-applied growth retardants {mefluidide, (N-[2,4-dimethyl-5-[[(trifluoromethyl)sulfonyl]amino] pheny ...
DOI:
10.2134/agronj1985.00021962007700030026x

28. Uptake, Distribution, and Remobilization of 15N-labeled Urea Applied to Maize Canopies

Author:
Below, F. E.; Crafts-Brandner, S. J.; Harper, J. E.; Hageman, R. H.
Source:
Agronomy journal 1985 v.77 no.3 pp. 412-415
ISSN:
0002-1962
Subject:
nutrient transport; Zea mays; foliar application; translocation (plant physiology); urea fertilizers; yields; Illinois
Abstract:
... Field-grown maize (Zea mays L.) plants (hybrid B73 X Mo17) were sprayed with ¹⁵N-enriched urea to determine recovery and subsequent distribution within the plant. Plants were sprayed with ¹⁵N enriched urea at 7 days pre- (treatment 1) and post-anthesis (treatment 2) to provide a total of 22.3 kg N ha⁻¹ (350 mg N plant⁻¹). Unsprayed plants were used as controls. Plots were located on Flannigan silt ...
DOI:
10.2134/agronj1985.00021962007700030014x