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Articles 1 - 30 of 50
Full-Text Articles in Agronomy and Crop Sciences
Evaluation Of S-734 And Bas 9052 For Control Of Johnsongrass (Sorghum Halepense) In Soybeans (Glycine Max), Julio Beingolea Ochoa
Evaluation Of S-734 And Bas 9052 For Control Of Johnsongrass (Sorghum Halepense) In Soybeans (Glycine Max), Julio Beingolea Ochoa
Masters Theses & Specialist Projects
Johnsongrass is one of the more limiting factors in soybean production and is the most serious weed problem in the Southeastern United States. Actually, different herbicides are used in johnsongrass control, and still there are new herbicides which are being tested. Two experimental herbicides for johnsongrass control in soybeans are BAS 9052 and S-734.
The experiments were conducted in 1980 and 1981 with the objective to evaluate the effectiveness of S-734 alone and in combination with mefluidide and BAS 9052, BAS 9052 applied early or late postemergence, trifluralin, alachlor, and fluchloralin for seedling and rhizome johnsongrass control.
In both areas …
Nutritive Evaluation Of Warm-Season Grasses In Connecticut, R.W. Taylor, D.W. Allinson
Nutritive Evaluation Of Warm-Season Grasses In Connecticut, R.W. Taylor, D.W. Allinson
Storrs Agricultural Experiment Station
No abstract provided.
Results Of The Third High Protein-High Lysine Wheat Observation Nursery Grown In 1977, S. L. Kuhr, V. A. Johnson, P. J. Mattern, K. D. Wilhelmi
Results Of The Third High Protein-High Lysine Wheat Observation Nursery Grown In 1977, S. L. Kuhr, V. A. Johnson, P. J. Mattern, K. D. Wilhelmi
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This is the third report of results from a high protein-high lysine (HP-HL) wheat observation nursery organized in 1974 by the Nebraska Agricultural Experiment Station and the Science and Education Administration, U.S. Department of Agriculture, under a contract with the Agency for International Development, U.S. Department of State. Advanced experimental lines distributed to breeders and cooperators in the 3rd HP-HL nursery were selected from numerous hybrid combinations of both spring and winter types. All exhibited elevated protein and/or lysine in nursery trials in Nebraska or Arizona.
Connquest, Sandra Cookson, D.W. Allinson, G.S. Speer, R.W. Taylor, R.P. Prince, J.W. Bartok, D.W. Protheroe, D.R. Miller
Connquest, Sandra Cookson, D.W. Allinson, G.S. Speer, R.W. Taylor, R.P. Prince, J.W. Bartok, D.W. Protheroe, D.R. Miller
Storrs Agricultural Experiment Station
No abstract provided.
Results Of The Tenth International Winter Wheat Performance Nursery Grown In 1978, S. L. Kuhr, V. A. Johnson, P. J. Mattern, K. D. Wilhelmi, J. W. Schmidt
Results Of The Tenth International Winter Wheat Performance Nursery Grown In 1978, S. L. Kuhr, V. A. Johnson, P. J. Mattern, K. D. Wilhelmi, J. W. Schmidt
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This is the tenth report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Science and Education Administration (SEA), U.S. Department of Agriculture, under contract number AID/ta-C-1093 with the U.S. International Development Corporation, Agency for International Development. The Nursery was designed to (1) test the adaptation and stability of winter wheat cultivars in a range of latitudes, daylengths, fertility conditions, water management regimes, and disease complexes; (2) identify superior winter cultivars to serve as recipient genotypes for high protein and high lysine genes: (3) test the …
Use Of Molybdenum In The Transplant Water For Burley Tobacco, J. L. Sims, Jones H. Smiley, M. E. Suchy, A. M. Wallace
Use Of Molybdenum In The Transplant Water For Burley Tobacco, J. L. Sims, Jones H. Smiley, M. E. Suchy, A. M. Wallace
Agronomy Notes
The need for adding molybdenum to tobacco arises because contents in Kentucky soils generally are on the "borderline" of sufficiency and because amounts of available molybdenum in soil are low when soil pH is low. Soil pH in tobacco fields at midseason often is 0.5 to 1.0 pH unit lower than prior to fertilization. primarily because of the high rates of commercial fertilizers commonly applied to tobacco. This acidity greatly lowers the availability of molybdenum to tobacco plants. That is why we recommend the use of molybdenum when soil pH before fertilization is 6.4 or below.
Blueberry Progress Reports, Amr A. Ismail, David E. Yarborough, Delmont C. Emerson, John M. Smagula, Edward Mclaughlin, John Frett, Frank L. Caruso, Michael G. Zuck, Timothy E. Bourett, G R. Benoit, W J. Grant
Blueberry Progress Reports, Amr A. Ismail, David E. Yarborough, Delmont C. Emerson, John M. Smagula, Edward Mclaughlin, John Frett, Frank L. Caruso, Michael G. Zuck, Timothy E. Bourett, G R. Benoit, W J. Grant
Wild Blueberry Research Reports
The 1980 edition of the Blueberry Progress Reports was prepared for the Maine Blueberry Commission and the University of Maine Blueberry Advisory Committee by researchers with the Maine Life Sciences and Agriculture Experiment Station and Maine Cooperative Extension Service at the University of Maine, Orono. Projects in this report include:
1. Weed Control in Lowbush Blueberry Fields
2. Pruning of Blueberries
3. Integrated Pest Management of Blueberries in Maine
4. Physiology and Culture of the Lowbush Blueberry
5. Blueberry Diseases: Incidence and Control
6. Insects Affecting the Blueberry
7. Effect of Plant-Water Stress on "Lowbush" Blueberry Growth, Yield and Quality …
Correction And Prevention Of Soil Compaction, Lloyd W. Murdock
Correction And Prevention Of Soil Compaction, Lloyd W. Murdock
Agronomy Notes
Soil can be compacted by both natural and man made forces. The most common cause results from tillage practices. These man induced compacted layers are often called a traffic pan, disc pan, plow pan, wheel compaction, hard pan, etc. Some compaction occurs in most soils that are tilled. If compaction is Severe enough, it may reduce plant growth and yield. Soil compaction can be corrected by subsoiling and deep plowing but they are expensive methods. Soil compaction may not be a problem if one understands compaction, its effects, and how to prevent it.
Heat Tolerance Of Kentucky Bluegrasses, Perennial Ryegrasses, And Annual Bluegrass, David J. Wehner, T. L. Watschke
Heat Tolerance Of Kentucky Bluegrasses, Perennial Ryegrasses, And Annual Bluegrass, David J. Wehner, T. L. Watschke
Office of the Dean (CAFES) Scholarship
Use of cool-season turfgrasses in transitional environments is limited, in part, by their heat tolerance. Development of a rapid heat tolerance screening technique would be of value in determining the potential of turf•grasses for use in warmer areas.
The heat tolerance of 22 Kentucky bluegrass (Poa pratensis L.) cultivars, Poa annua L., and four perennial ryegrass cultivars (Lolium perenne L.) was evaluated by exposing plants for 30 min to temperatures ranging from 41 to 49 C in single degree intervals. Ten-week-old plants, which had been grown under a low level of N fertilization and watered infrequently to maximize …
Soil Science Research Report - 1981
Soil Science Research Report - 1981
Soil Science Research Reports
Corn Experiments
Application of Fertilizer with Tillage Equipment Used in Row Crop Production .......... Section 1
The Influence of Source of N, N Rates, and a Nitrification Inhibitor on the Yield of Pivot Irrigated Corn Grown on a Sandy Loam Soil .......... Section 2
The Influence of Two Different Starter Fertilizers on Grain Yield of Eight Hybrid Varieties Grown on Cass Fine Sandy Loam Containing Free Lime .......... Section 3
The Influence of Limestone and Promesol-30 on Soil pH and Yield of Irrigated Corn Grown on a Crete Silty Clay Loam Soil .......... Section 4
The Influence of Acid-forming Material …
Herbicides On Tomato, Capsicum And Eggplant, D J. Gilbey
Herbicides On Tomato, Capsicum And Eggplant, D J. Gilbey
Experimental Summaries - Plant Research
SUMMARY Stomp controlled the widest range of weeds with a wide margin of crop tolerance. Recommend. 3 l/ha or lower before transplanting. Bensulide controlled grasses well, but did not control nightshade. Recommend 12 l/ha after transplanting. Lasso controlled a wide range of weeds, but the margin of selectivity is narrow. Recommended maximum 4 l/ha. Surflan controlled all weeds well, except nightshade, when applied after transplanting. The margin of selectivity is narrow on tomato and zero for nightshade. Recommend 1.5 1 after transplanting. Trifluralin controlled 3 weeds, and the margin of selectivity is narrow. Recommend rate of 4 l/ha. Trials - …
Loose Smut Of Barley. Sub-Clover Root Rot. Rapeseed Diseases., M. J. Barbetti
Loose Smut Of Barley. Sub-Clover Root Rot. Rapeseed Diseases., M. J. Barbetti
Experimental Summaries - Plant Research
Loose smut of barley. Fungicidal control of loose smut in barley – 81MT31, 81NA29. Sub-clover root rot. Fungicidal control of pythium sp – 81AL37, 81BU3. Rapeseed diseases. 1. Rapeseed varieties/Lancelin blackleg strain – 81MO24. 2. Rapeseed varieties/Sclerotinia disease – 81MT32. 3. White leaf spot and grey stem of rapeseed – 81MT33.
Barley Disease, Scald, Spot Type Net Blotch, Powdery Mildew, Leaf Diseases, Double Cropping, Resistance Of Cvt Barley, T N. Khan
Experimental Summaries - Plant Research
I. Barley disease survey and an unidentified disorder on forrest barley. II. Scald: crop loss assessment – 81BA20, 81A17, 81MT23, 81WH30, 81A17, 81BA20, 81MT23, 81WH30, III. Scald: epidemics in simulated populations segregating for scald resistance – 81BA22, 81MT25, 81BA22, 81MT25. IV. Scald: reactions in single plant and hill plots – 81MT24, 81MT21, 81BA21, V. Spot type net blotch: crop loss assessment – 81C17. VI. Net blotch: effect of grazing on infection levels – 81A20. VII. Powdery mildew: crop loss assessment – 81PE5. VIII. Value of whole plot scores in assessing leaf diseases. IX. Disease and yield in simulated double cropping …
Sulphur Nutrition Of Pastures And Crops, Phosphorus And Potassium Nutrition Of High Rainfall Pastures On Deep Sands, Soil Acidity - High Rainfall Pastures, J S. Yeates, M F. Clarke
Sulphur Nutrition Of Pastures And Crops, Phosphorus And Potassium Nutrition Of High Rainfall Pastures On Deep Sands, Soil Acidity - High Rainfall Pastures, J S. Yeates, M F. Clarke
Experimental Summaries - Plant Research
A. SULPHUR - HIGH RAINFALL 1. Rates and time of application of superphosphate to pastures. 79AK2, 79AL23, 79AL25, 79AL41, 81BY1, 81KE1. 2. Sulphur soil test calibration on pastures. 79AL18, 80BY2, 80KE2. 3. Sulphur soil test calibration on pastures: Co-operative PKS soil test project on pastures on duplex soils of the east Albany area (PRD/ARO). Sulphur results. 80 AL44, 46, 47, 48, 72, 73 81AL51, 53, 55 4. Sulphur on adsorbing soils receiving no current S input. 80BY1., 80AL16. 5. Sources, rates, time of application of sulphur on pastures. 80AL1, 80AL4, 81AL3, 81AL4, 80KE1, 80MA1 B. SULPHUR - LOW RAINFALL 1. …
Aerial Spraying Trial., G A. Pearce
Aerial Spraying Trial., G A. Pearce
Experimental Summaries - Plant Research
Conclusions 1. The volume of application with water affected the results obtained. The visual results of Treatment 1 suggested it was not an acceptable commercial result and the plant counts support this conclusion. Treatments 2 and 3 looked very similar and were very similar and were very acceptable results. 2. The height of spraying affected the results in that where the plane had to start climbing to pass over trees, the effectiveness dropped off. 3. Spray drift could be a problem because of the risk of causing damage to trees and native vegetation. Severe damage was seen on trees at …
Pasture Trials At Esperance, M Da Bolland
Pasture Trials At Esperance, M Da Bolland
Experimental Summaries - Plant Research
Introduction. Most of the 1981 data viz seed yield results, and hardseed data, has not yet been completely processed, and thus only some of the data can be presented in this summary. Section i: Medic species trials – 80SG39, 80SG23, 80SG24, 80ES65(a), 80ES21 (a). Section ii: Lucerne variety trials – 81ES28, 81ES25, 81ES29, 81ES30, 81ES31.
Septoria Diseases Of Wheat, A. G. P. Brown
Septoria Diseases Of Wheat, A. G. P. Brown
Experimental Summaries - Plant Research
Effect of stubble on septoria infection. Avondale, Badgingarra, Chapman, Esperance, Kojonup, Mt Barker, Newdegate, Wongan - 81BA47, 81BA48.
Legume Seed Inoculation, D. L. Chatel
Legume Seed Inoculation, D. L. Chatel
Experimental Summaries - Plant Research
Medic inoculation experiments – 81ME6, 81GE5. Inoculation trials were conducted at Holleton (81ME6) and Canna (81GE5).The major objectives were: 1. To test the field effectiveness of new strains of Rhizobium meliloti and to compare them with standard strains. 2. To initiate trials aimed at examining the performance of R. meliloti as long term colonisers of mildly acid soils. These trials are the first in a programme aimed at looking at the feasibility of developing acid tolerant strains for large areas of acid soil which are not suitable for growing subterranean clover. The 1981 trials will provide a basis for comparison …
Doublegee Seed Dormancy. Lupins -Weed Control,Herbicides, New Products, D J. Gilbey
Doublegee Seed Dormancy. Lupins -Weed Control,Herbicides, New Products, D J. Gilbey
Experimental Summaries - Plant Research
Doublegee seed longevity x depth - 75WH66, 76C9, 76KA8. Grass control in dry sown lupins – 81A46, 81GE21, 81TS33. Broadleaf weed control in dry sown lupins – 81TS34, 81A47. Early post-emergence weed control – 81GE20. Early post-emergence weed control - lupins - 81TS32, 81A45. Post-emergence grass control in lupins. Post-emergence grass control in lupins None of the mixtures of Barban with Hoegrass and Matavin controlled the main target, Bromegrass. No significant differences due to treatments were detected in grain yields except at Avondale where annual ryegrass was the main grass weed which was controlled readily by the Hoegrass treatments as …
1981 Trace Element Nutrition, J. W. Gartrell, R F. Brennan
1981 Trace Element Nutrition, J. W. Gartrell, R F. Brennan
Experimental Summaries - Plant Research
1. Long term copper trial - Newdegate Research Station - 66N14. 2. Zinc residual with OAP for wheat - 80NO31. 3. Zinc residual with OAP for wheat - 79ME22. 4. Zinc residual with OAP for wheat - 79ME23. 5. Zinc, sulphur and copper residual with OAP for wheat - 79WH66. 6. Wheat response to zinc rates - 81MO8. 7. Manganese on wheat and oats - 81KA29. 8. Molybdenum and ammonium sulphate (S/A) on wheat - 81NO40. 9. Molybdenum and ammonium sulphate on wheat - 81NO41. 10. Molybdenum and ammonium sulphate on wheat - 81NO39. 11. Mo, lime, Mg on sub. …
Minimum Tillage, Stubble Management, Deep Ripping, Newland Clearing, Residual Chemicals, R J. Jarvis
Minimum Tillage, Stubble Management, Deep Ripping, Newland Clearing, Residual Chemicals, R J. Jarvis
Experimental Summaries - Plant Research
A/ Long term Minimum Tillage Investigations (i) Continuous Cropping Sites - 77A16, 77WH17, 77M13, 78M25, 77E18, 77MT15, 78BA42 (ii) Rotational Sites - 77A43, 77WH88, 77M56, 77E52, 77MT51. B/ Minimum Tillage Investigations Including - Time of seeding Cultivars and varieties. Depth of cultivation. Depth of seeding. Nitrogen rates - 81WH8, 81N5, 81NA31, 81NA32, 81WH3, 81A2, 81M45, 81M46, 81GE24, 81N29, 81NA40, 81M24, 81M25, 81MO10, 81MO11, 81MO12. C/ Stubble Management Techniques - 79WH6, 79M7. Stubble Trials by Other Researchers - 78WH3, 78C3, 78M2, 81TS36. D/ Deep Ripping - 80A44, 77WH17, 81NO3, 81NO4, 80NO46, 81NA10, 81NA11, 79MO19, 81NO2, 81M45, 81MO39. 81M45, 81M45, 81ES58 ,81ES57, …
Nitrogenous Fertiliser Requirements In Different Cropping Rotations 1981 Results, M G. Mason, I C. Rowland
Nitrogenous Fertiliser Requirements In Different Cropping Rotations 1981 Results, M G. Mason, I C. Rowland
Experimental Summaries - Plant Research
Nitrogen Requirement of Wheat After Clover, Lupins and Cereal – 78C1, 80BA3, 78N1. Nitrogen Requirement of Barley After Clover, Lupins and Non Legume – 78E3. Nitrogen Fertiliser Requirement in Alternate Crop-Pasture Rotation – 78BA1, 78WH2. Nitrogen Fertiliser Requirement in a Lupin - Wheat Rotation – 81LG29.
Part 1. A. Take-All Of Cereals B. Rhizoctonia C. Pythium Root Rot Of Wheat, Part 2, A. Minimum Tillage Trials., G S. Macnish
Part 1. A. Take-All Of Cereals B. Rhizoctonia C. Pythium Root Rot Of Wheat, Part 2, A. Minimum Tillage Trials., G S. Macnish
Experimental Summaries - Plant Research
Take-all following cleaning crops. Take-all build-up on new land rotation. Take-all build-up and rates of phosphorus on wheat. Long-term rotation and take-all. Take-all incidence in cereal/lupin rotation. Take-all incidence in a wheat/clover or/pasture rotation. Continuous wheat and take-all. Rhizoctonia patch of cereals. Rhizoctonia mapping experiment. Rhizoctonia patch - control. Pythium root rot of wheat. Part 2. Sprayseed followed by direct drilling with triple disc drill. Plough, Sprayseed followed by direct drilling with triple-disc drill. Sprayseed followed by direct drilling with combine. Cult + seed with combine - Sprayseed followed by cultivation followed by drilling with combine. For this report the …
Grass Control In Pastures., C W. Thorn
Grass Control In Pastures., C W. Thorn
Experimental Summaries - Plant Research
Crop Yields after Pasture Manipulation in 1980. Effect of Grass Control on Pasture Production. Effect of Grass Control on Animal Production. Pasture Density Effects and Composition on Soil Nitrogen. The Effect of Kerb (R) on Rapeseed, Linseed and Barley Grass. 80M041, 80M040, 80AB2, 81A23, 81 A188, 81Ba2, 81 N3, 81 N2, 81 A11 81N21, 81Ka1, 81Ka2, 81 Na3, 81NO5, 81MO1
Investigations Of Ryegrass Toxicity., Brian A. Stynes
Investigations Of Ryegrass Toxicity., Brian A. Stynes
Experimental Summaries - Plant Research
81KA47, 81NA47, 81M047, 81KA48, 81NA45, 81M045, 81KA50, 81NA46, 81M046, To monitor the amount of toxin present in galls from the time of first head emergence until maturation of the ryegrass pastures. To relate the onset and development of toxicity to plant growth stages and climatic conditions in the different regions affected by annual ryegrass toxicity. To relate the level of toxicity to pasture density and to the number of galls present in the pasture. As part of the series of experiments done to monitor the amount of toxin present in pasture at a number of sites throughout the seasons, an …
Long Term Rotation Trials., I Rowland.
Long Term Rotation Trials., I Rowland.
Experimental Summaries - Plant Research
Long term rotation trials. 66M29/2083EX, 67Cl3/2332EX , 67N4/2333EX, 68E5/2474EX , 68SG5/2475EX , 73SG16. Lupins: Wheat Rotation. 79GE36/3288EX, 79GE37/3288E, 80TS3/3288EX, 73SG16/3229EX Continuous Cropping with Nitrogenous Fertiliser. 80NA6
Summary Of Experimental Results Field Trials 1981, P A. Rutherford
Summary Of Experimental Results Field Trials 1981, P A. Rutherford
Experimental Summaries - Plant Research
80NA46, 80NA45, 79TS27, 80A46, 80NA50, 79N036, 81M041, 81Pe12, 79KU1, Weed control on roaded catchments. Demonstration catchment. Chemical firebreaks on deep white sand. Chemical firebreak evaluation - long term. Residual herbicides for annual weed control - long term cost evaluation. Long-term weed control on Railway Track. Control of annual weeds on road shoulders
The Effect Of Soil Acidity On Crop And Pasture Production., W Porter, R Klemm
The Effect Of Soil Acidity On Crop And Pasture Production., W Porter, R Klemm
Experimental Summaries - Plant Research
SUMMARY The effects of lime and molybdenum applications on wheat and subterranean Clover were studied further. Wheat. In relation to lime use, my aim is to develop soil tests to be used to predict when a soil requires lime to produce maximum yield, and to predict the optimum rate of lime. Using the results from field trials commenced in 1980 and 1981 the soil parameters which may be used to predict lime responses in wheat have been narrowed down. From the relationships between soil data and lime responses it appears that soil ph (measured in 1:5 H20 or 1:5 N …
Experimental Summaries., M W. Perry, R N. Weir
Experimental Summaries., M W. Perry, R N. Weir
Experimental Summaries - Plant Research
Wheat Yield Potential Trials, 81BA4, 81WH7, 81KAS.Wheat-Regenerating Sandplain Lupin Rotation Trials, 79GE38, 79GE42.Nitrogen x Cycocel x Foliar Nutrients x Fungicide-on Wheat,81KA6. Historical Wheat Trials, 81A3, 81C4, 81SG22, 81WH6. Time of Planting on Cereal Yields, 81NA8, 81KA55.
Growth Regulator Trials. Part 1, M W. Perry, R N. Weir
Growth Regulator Trials. Part 1, M W. Perry, R N. Weir
Experimental Summaries - Plant Research
This summary covers 1981 trials on chlormequat plant growth regulant (formulated as Cycocel 750A or Halloween), ECO organic seed dressing and a range of organic foliar sprays. Rates and times of application of chlormequat on wheat. 81A22, 81BA3, 81Cl8, 81E25, 81M22, 81MT2, 81N4, 81SG36, 81WH4. Effects of chlormequat on wheat varieties (S4 trials). 81A6, 81BA7, 81C6, 81E6, 81M9, 81M13, 81MT9, 81N10, 81SG26, 81WH19. Trials comparing organic seed treatments, organic foliar sprays and plant growth regulators. 81WH61, 81LG34, 81LG48, 81ME27a, 81ME276, 81TS39, 81ES51, 81ES52, 81ES53, 81ES54, 81NA57, 81N4A, 81MT2A, 81TS38A. H. McCashney, Cadoux Un-numbered, Newdegate Research Station.