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Articles 1 - 6 of 6
Full-Text Articles in Agriculture
A Technique For Physiologically Age-Grading Female Stable Flies, Stomoxys Calcitrans (L.), P. J. Scholl
A Technique For Physiologically Age-Grading Female Stable Flies, Stomoxys Calcitrans (L.), P. J. Scholl
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
A method of dissection followed by staining was initiated to allow physiological age- grading based on ovarian development in order to more completely describe the physiological development of adult female stable flies [Stomoxys calcitrans (L. )]. The gonotrophic developmental continuum from a non-differentiated cell in teneral females to mature eggs at the time of oviposition was first arbitrarily divided into six stages by using distinct landmarks within the developing oocyte . Then, nulliparous, uniparous, and biparous+ females were differentiated on the basis of the presence or absence of stained follicular relics in the ovariole sheaths. The combination of the …
Growth And Survival Of Nebraska Panhandle Wheat Farms Under Selected Financial Conditions, Larry J. Held, Glenn A. Helmers
Growth And Survival Of Nebraska Panhandle Wheat Farms Under Selected Financial Conditions, Larry J. Held, Glenn A. Helmers
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Simulation was used to analyze impact of land expansion alternatives, self-imposed borrowing limits, starting equity conditions, and land appreciation upon a firm concurrently seeking growth and survival over a projected 15-year period (1976-1990). An average-sized 960-acre (389 ha) Nebraska Panhandle wheat-fallow farm served as the representative firm. Standard production practices and technologies were used for computing costs. Machinery and operating costs were assumed to inflate five percent annually. Dryland wheat acreage was valued at $375 per acre ($926.63 per ha) in 1976 and was allowed to appreciate at an annual rate of four percent. A hypothetical series of three cyclical …
The Beef Delivery System: Optimal Plant Sizes, Locations And Product Flows, J. C. Hafer, J. G. Kendrick
The Beef Delivery System: Optimal Plant Sizes, Locations And Product Flows, J. C. Hafer, J. G. Kendrick
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The United States beef delivery system is composed of three stages: procurement, processing, and distribution. Minimization of costs associated with these stages can be accomplished best by identification of optimal plant sizes and locations. Research was directed toward an analytical approach that could be used to minimize total costs of the U.S. beef delivery system. This report will discuss the grid system used to divide the · United States into study units, describe features of the model used, discuss research results, and offer conclusions.
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
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
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
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 …
Influence Of Fertilizer Nitrogen And Sulfur On Production Of Malting Barley, G. W. Rehm, R. S. Moomaw
Influence Of Fertilizer Nitrogen And Sulfur On Production Of Malting Barley, G. W. Rehm, R. S. Moomaw
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
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 …
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
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
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
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 …