Agronomy and Crop Sciences Commons^™

Results Of The Thirteenth International Winter Wheat Performance Nursery Grown In 1981, S. L. Kuhr, C. J. Peterson, V. A. Johnson, P. J. Mattern, J. W. Schmidt

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This is the thirteenth report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Agricultural Research Service (ARS), 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 …

Evaluation Of Crested Wheatgrass Introductions For Forage Yield And Quality, K. P. Vogel, P. E. Reece, J. F. S. Lamb

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Crested wheatgrass, Agropyron cristatum and A. desertorum, are among the most important cool-season forage grasses in the United States and Canada, particularly for reseeding arid range sites. Further improvement in this grass by breeding depends on identifying sources of genetic variability for forage yield and quality. Foreign introductions are an obvious source of genetic variation since crested wheatgrasses are introduced species. In this study 38 accessions (PI lines) and 8 Nebraska experimental lines were evaluated for forage quality as measured by in vitro dry matter digestibility (IVDMD) and protein content and for forage yield. The cultivars 'Ruff' and 'Nordan' …

Clover, Bluegreen Aphid And Red Legged Mite Screening, Medicago Murex Evaluation, D J. Gillespie

Experimental Summaries - Plant Research

Clover scorch: In spite of poor seasonal conditions, adequate levels of clover scorch developed in the test plots to readily identify susceptible clovers. Of the 333 introductions tested, 23% scored 3.0 or less indicating a high level of resistance. Bluegreen aphid screening: Two hundred and twenty four randomly selected subterranean clovers from all Western Mediterranean collections were tested for resistance to BGA in Nov/Dec of 1983. The susceptibility of annual legumes to Bluegreen aphid. Red legged earth mite screening: Results of two preliminary experiments to develop techniques for mass screening for RLEM resistance in subterranean clover were reported last year. …

Notes: Differences Among Nematode Populations In Tall Fescue Pastures In North, Central, And South Alabama, Jeffrey F. Pedersen, R. Rodriguez-Kabana

Department of Agronomy and Horticulture: Faculty Publications

Surveys of nematode populations in tall fescue (Festuca arundinacea Schreb.) pastures in north, central, and south Alabama in 1982 and 1983 showed significant differences in frequency of occurrence of many nematode species by geographical region. Although nematode damage has been implicated in the poor adaptation of tall fescue to the sandy soils of the extreme Southeast, many plant parasitic nematode species occurred in low frequency in south Alabama pastures. There were significant differences in the frequency of occurrence of Paratrichodorus christiei (Allen) Siddiqi by region. This nematode occurred with relatively high frequency in south Alabama in both years. There were …

Results Of The Twelfth International Winter Wheat Performance Nursery Grown In 1980, S. L. Kuhr, C. J. Peterson, V. A. Johnson, P. J. Mattern, J. W. Schmidt

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This is the twelfth report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Agricultural Research Service (ARS), 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 degree …

Evaluation Of Bromegrass Introductions For Forage Yield And Quality, Kenneth P. Vogel

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Smooth bromegrass (Bromus inermis Leyss.) is one of the most important cool-season forage grasses in the United States and Canada. Further improvement in this grass by breeding depends on identifying sources of genetic variability for forage yield and quality. Since smooth bromegrass is an introduced species, foreign introductions are an obvious source of genetic variability. This study evaluated 49 smooth bromegrass introductions for forage yield and quality as measured by in vitro dry matter digestibility (IVDMD) and protein content and compared them with the cultivar 'Lincoln'. Evaluated in a separate study and reported here were eight meadow bromegrass ( …

Results Of The Eleventh International Winter Wheat Performance Nursery Grown In 1979, S. L. Kuhr, V. A. Johnson, P. J. Mattern, J. W. Schmidt

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This is the eleventh report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Agricultural Research Service (ARS), 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 degree …

Ord River Irrigation Area Of Western Australia - Background Information For Prospective Farmers, Western Australian Department Of Agriculture

Farm Systems and Economics published reports

The Ord Irrigation Project is located in the Shire of Wyndham-East Kimberley in the far north of the State of Western Australia.

The potential for harnessing northern rivers was realised many years ago. In 1941, a small experimental farm was established on the Ord, and possible dam sites were investigated upstream.

In 1945, this small experimental farm was relocated and the Kimberley Research Station was established on Ivanhoe Plain, part of the 12,000 hectare area now irrigated from Lake Kununurra above the Diversion Dam.

By 1958, the Western Australian Government was convinced of the viability of an irrigation scheme on …

Investigations Of Ryegrass Toxicity., Brian A. Stynes.

Experimental Summaries - Plant Research

Control of spray topping, 82KA28. Emergence of nematode larvae from galls, 82KA29, 82NA33, 82M019. Effects of long term cropping, 81KA57. Long term effects of spray topping, 81KA58. Development of toxicity, 81KA47, 81NA47, 81M047.

Organic Matter As A Source Of Nitrogen., A. Reincke

Experimental Summaries - Plant Research

The nitrogen value of legumes, 81GE4, 81NA6. The nitrogen value of clover legumes and the effect of top removal, 81A5. The nitrogen value of one year old and two year old clovers, 81C4. The effect of plant materials on the amounts of mineral nitrogen, 81LAB 2. The effect of soil type on mineral nitrogen, 81LAB 4. The effect of different nitrogen contents of organic matter on the release of nitrogen with time, 81GH2.

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 …

Ord River Irrigation Area Of Western Australia, Western Australian Department Of Agriculture

Farm Systems and Economics published reports

The Ord Irrigation Project is located in the Shire of Wyndham-East Kimberley in the far north of the State of Western Australia.

The potential for harnessing northern rivers was realised many years ago. In 1941, a small experimental farm was established on the Ord, and possible dam sites were investigated upstream.

In 1945, this small experimental farm was relocated and the Kimberley Research Station was established on Ivanhoe Plain, part of the 12,000 hectare area now irrigated from Lake Kununurra above the Diversion Dam.

By 1958, the Western Australian Government was convinced of the viability of an irrigation scheme on …

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

Nebraska Agricultural Experiment Station: Historical Research Bulletins

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

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

Nebraska Agricultural Experiment Station: Historical Research Bulletins

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 …

Fisheries Report No 45 - The Short Term Effects Of Brush Harvesting On The Kwongan Vegetation At Eneabba, Western Australia, E. A. Griffin, A. J. M. Hopkins

Fisheries Research Reports

Areas of the kwongan vegetation south of Eneabba are currently being harvested to provide brush for rehabilitation after mining. Because of the botanical importance of the Eneabba kwongan, a study of the effects of the harvesting was initiated. Three areas with different harvest histories were sampled using quadrats paired across cut/uncut boundaries. Floristic and structural differences between quadrats and between areas were assessed. The store of seed in uncut vegetation was measured.

There was a loss of species as a result of harvesting, at least in the short-term. Many species regenerated by resprouting from buds in damaged stems or in …

Ord River Irrigation Area - Potential For A Sugar Cane Industry In Western Australia, Department Of Agriculture, Western Australia

Farm Systems and Economics published reports

The Ord River Irrigation Area is in the Kimberley Region of Western Australia, 3,200 kms from Perth, the State’s Capital City.

The area is located in the arid tropics with a climate suitable for high plant growth rates provided water supply is adequate.

With only 12,000 ha of land developed out of a potential 72,000 ha of clay soils the area has the potential for further development of a major irrigated agricultural enterprise.

The Ord River Irrigation Project has been developed for commercial agriculture following the construction of a diversion dam in 1963, and a major dam in 1974, The …

Simulating The Water Requirements And Economic Feasibility Of Corn In The Midwest, Wendi L. Palmer, B. J. Barfield, M. E. Bitzer, C. T. Haan

KWRRI Research Reports

An evaluation of the economics of supplemental irrigation when using a surface water supply must be site specific in order to account for variations in soil moisture holding capacity, watershed area supplying the runoff, climatic conditions, and proposed irrigation management procedures.

With the use of farm specific simulation models to determine grain yields, availability of irrigation water, and economic expenditures involved in irrigation, an economic evaluation of supplemental irrigation can be performed, In the model presented in this report, the Duncan SIMAIZ model is used to predict grain yields using long-term daily weather information. SIMAIZ also determines irrigation water demand …

Alfalfa Insect Management Studies 1971-77, G. R. Manglitz, W. R. Kehr, D. L. Keith, J. M. Mueke, J. B. Campbell, R. L. Ogden, T. P. Miller

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Three tests in southwestern Nebraska during 1971 and 1972 evaluated insecticides against the army cutworm. Adult alfalfa weevils did not damage new second growth alfalfa in a small plot study during a 3-year period (1973-1975) at Gothenburg, NE. However, excellent control of larval alfalfa weevils was obtained. These results indicated a need to establish economic threshold levels for the alfalfa weevil in Nebraska to prevent unnecessary use of insecticides. Four tests to control the alfalfa weevil with registered insecticides verified the efficacy of these materials under Nebraska conditions. A series of tests conducted during 1975 at the Mead Field Laboratory …

Leaf Diffusive Resistance And Relative Water Content As Indications Of Varietal Sensitivity To Drought In Potatoes, Darlene A. Wilcox, Richard A. Ashley

Storrs Agricultural Experiment Station

No abstract provided.

Influence Of Fertilizer Nitrogen And Sulfur On Production Of Malting Barley, G. W. Rehm, R. S. Moomaw

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Studies in north-central Nebraska from 1975 through 1977: 1. Evaluated the malting barley production potential of the irrigated sandy soils of the region. 2. Measured the effect of application of N and S on yield and quality of barley grown for malting purposes. 3. Investigated the ability of N analysis of barley in the vegetative stage to predict protein content of grain at harvest. Data gathered lead to the following conclusions: 1. The potential for production of malting barley on irrigated sandy soils of north-central Nebraska is limited. 2. Yields increased with the application of fertilizer N throughout the study …

Evaluation Of Bas 9052 & Bas 9021 For Control Of Johnsongrass (Sorghum Halpense) In Soybeans (Glycine Max), Sheryl Rogers

Masters Theses & Specialist Projects

The lack of adequate weed control is one of the major problems encountered in soybean production. Johnsongrass presents one of the most serious weed control problems in the Southeastern United States. numerous herbicides are used in an effort to control johnsongrass, and research is still being conducted to find new herbicides for this purpose. Two of these herbicides are BAS 9021 [6,6-dimethyl-2,4-dioxo- 3[1-[2-(propenyloxy)amino]butylidene]-cyclohexane] and BAS 9052 [2-(n-ethoxybutyrimidoyl)-5-(2-ethylthiopropy1)-3- hydroxy-2-cyclohexen-1-one].

In 1978, johnsongrass control with BAS 9021 at 1.1 and 1.7 kg/ha in sim-le early postemergence or late postemergence applications, or in each of two split applications, was evaluated using the herbicide …

Relationship Of Vigour Tests And Seed Lots To Cotton Seedling Establishment, U. R. Bishnoi, James C. Delouche

All Articles

No abstract provided.

Results Of The Second High Protein-High Lysine Wheat Observation Nursery Grown In 1976, S. L. Kuhr, K. D. Wilhelmi, V. A. Johnson, P. J. Mattern

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This is the second report of results from a high protein-high lysine (HP-HL) 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. Primary objectives of this nursery are to: (1) Systematically provide breeders and cooperators with superior genetic germplasm for elevated levels of protein and/or lysine. (2) Test the degree of expression of the high protein and high lysine traits in a diverse array of environments. Funding from USAID has permitted the Nebraska …

Analysis And Testing Of Powered Tillage Blades, Larry G. Wells, E. M. Smith, D. E. Hammett

Biosystems and Agricultural Engineering Faculty Publications

Fundamental design considerations for powered rotary tillage blades are presented and discussed. The relationship between blade angular velocity and the geometric dimensions of cutting edges is specified for tillage blades rotating counter to the direction of travel and assuming a typical forward speed for tillage.

Analyses showed that a powered blade rotated opposite to the direction of travel can be operated at relatively lower angular velocities than can one rotated in the direction of travel to achieve equivalent blade velocity and acceleration relative to the soil. Furthermore, a blade rotated opposite to the direction of travel requires relatively lower power …

The Influence Of Harvesting Strategies And Economic Constraints On The Feasibility Of Farm Grain Drying And Storage Facilities, Otto J. Loewer Jr., Thomas C. Bridges, G. M. White, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

The economic return to on-the-farm grain drying and storage facilities is influenced by many factors including harvesting strategies, facility management, market conditions, energy considerations, and facility design. This study evaluates the influence of these factors on expected net return.

Economic Comparison Of Alternative Burley Tobacco Harvesting Practices By Computer, Thomas C. Bridges, Larry G. Wells, George A. Duncan, John N. Walker

Biosystems and Agricultural Engineering Faculty Publications

The computer model CATCH (Computer Analysis of Tobacco Cutting and Housing) was developed to provide the individual tobacco producer with management information concerning alternative methods of harvesting burley tobacco. CATCH utilizes specific producer in-puts to analyze 24 alternative burley production systems and presents up to four economic rankings containing costs, equipment and labor for each system. The economic rankings aid the producer in decision making with regard to his own operation.

Effects Of No-Tillage Fallow As Compared To Conventional Tillage In A Wheat-Fallow System, C. R. Fenster, G. A. Peterson

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The benefits of reducing tillage by use of herbicides for weed control emphasizes why research was started to study a fallow system where all tillage was replaced by herbicides. Wheat planting was then the only soil disturbing operation. Objectives of the research were to compare the effects of no-tillage (chemical), stubble-mulch and plow (bare fallow) systems of fallow on: 1. Grain yield. 2. Grain protein. 3. Residue retention. 4. Soil nitrate-nitrogen accumulation. 5. Soil water accumulations during fallow. Data presented are in the form of a progress report. These experiments will continue.

Results Of The Ninth International Winter Wheat Performance Nursery Grown In 1977, S. L. Kuhr, K. D. Wilhelmi, V. A. Johnson, P. J. Mattern, J. W. Schmidt

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This is the ninth report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 by the Nebraska Agricultural Experiment Station and the Science and Education Administration (SEA), U.S. Department of Agriculture, under a contract with the Agency for International Development, U.S. Department of State. 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 degree of expression …