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Full-Text Articles in Life Sciences
Estimating Crop Yield Potential At Regional To National Scales, Justin Van Wart, Kurt Christian Kersebaum, Shaobing Peng, Maribeth Milner, Kenneth Cassman
Estimating Crop Yield Potential At Regional To National Scales, Justin Van Wart, Kurt Christian Kersebaum, Shaobing Peng, Maribeth Milner, Kenneth Cassman
Department of Agronomy and Horticulture: Faculty Publications
World population will increase 35% by 2050, which may require doubling crop yields on existing farm land to minimize expansion of agriculture into remaining rainforests, wetlands, and grasslands. Whether this is possible depends on closing the gap between yield potential (Yp, yield without pest, disease, nutrient or water stresses, or Yw under water-limited rainfed conditions) and current average farm yields in both developed and developing countries. Quantifying the yield gap is therefore essential to inform policies and prioritize research to achieve food security without environmental degradation. Previous attempts to estimate Yp and Yw at a global level have been too …
Weather Risk And Size Economies Of Large Machinery In Wheat Production, Glenn A. Helmers, Romanus Monji
Weather Risk And Size Economies Of Large Machinery In Wheat Production, Glenn A. Helmers, Romanus Monji
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Major objectives of this study were to determine the existence of economies or diseconomies of size for large farms and to determine the impact of farmers' risk aversion level on the size of farm machinery selected.
Price, Yield And Net Income Variability For Selected Field Crops And Counties In Nebraska, Boris E. Bravo-Ureta, Glenn A. Helmers
Price, Yield And Net Income Variability For Selected Field Crops And Counties In Nebraska, Boris E. Bravo-Ureta, Glenn A. Helmers
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The primary objective of this study was to establish an empirical estimate of the riskiness of various crops in different regions of Nebraska. For this purpose the variate difference method was used to estimate random variability indexes of prices, yields, and net returns for six Nebraska crops (wheat, soybeans, alfalfa, oats, grain sorghum, corn). The period of analysis included 1957-1976 and one county in each of the eight crop reporting districts was analyzed. Where relevant, both dryland and irrigated alternatives were examined. Most business decision-makers accept more risk only under the conditions that the probability of higher returns accompany risky …
Place Discrimination In Rail Shipments Of Wheat From Great Plains Origins, Dale G. Anderson, Brian L. Mariska
Place Discrimination In Rail Shipments Of Wheat From Great Plains Origins, Dale G. Anderson, Brian L. Mariska
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The purpose of this study was to determine whether shipments of wheat by railroad from Nebraska and other Great Plains States are discriminated against relative to shipments from other wheat producing states and regions. Primary objectives were: (1) To develop a technique for measuring place discrimination (2) To employ the technique in testing empirical data for evidence of discrimination (3) To analyze the results and explore implications for geographically-separated wheat shippers.
Wheat And Feed Grains In The Great Plains And Northwest: Study Area Descriptions And State Statistical Summaries, W. F. Lagrone, R. E. Hatch, G. A. Helmers
Wheat And Feed Grains In The Great Plains And Northwest: Study Area Descriptions And State Statistical Summaries, W. F. Lagrone, R. E. Hatch, G. A. Helmers
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The objectives are: (1) To determine individual farm-supply response for alternative product-price relationships and price levels with emphasis on wheat, feed grains, cotton and livestock (2) To estimate aggregate subregional and regional supply functions for major commodities (3) To provide guides for optimum farm organizations and adjustments and attendant adjustments by farm-related businesses and institutions in the Great Plains and Western States.
Wheat And Feed Grains In The Great Plains And Northwest: Supply Response And Resource Use, G. A. Helmers, W. F. Lagrone
Wheat And Feed Grains In The Great Plains And Northwest: Supply Response And Resource Use, G. A. Helmers, W. F. Lagrone
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The basic objective of the research reported here is to estimate supply response with varying product prices for wheat and feed grains. Within a framework of representative farm income maximization, changing product price relationships lead to supply adjustments which are aggregated and expressed as normative supply functions. Another objective is to analyze the resource use and net returns with varying prices for wheat and feed grains. The analysis of resources considers changes in overall levels of resources demanded in response to changing wheat and feed grain prices. Similarly, the analysis of net returns examines differences in net returns in response …
Growing Proso In Nebraska, P. H. Grabouski
Growing Proso In Nebraska, P. H. Grabouski
Nebraska Agricultural Experiment Station: Historical Circulars
Proso, sometimes called "hog millet," is receiving attention in the Nebraska Panhandle as a dryland grain crop because of acreage restrictions and limited crop alternatives.
Profit Maximizing Farm Plans For Farms In Southeastern Nebraska: By Type And Size Of Farm, M. D. Skold, A. W. Epp, H. W. Hughes
Profit Maximizing Farm Plans For Farms In Southeastern Nebraska: By Type And Size Of Farm, M. D. Skold, A. W. Epp, H. W. Hughes
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
There are many forces operating in today's agricultural economy which cause farmers to examine carefully their patterns of resource allocation. Rising production costs coupled with downward tendencies in product prices focuses attention on efficient patterns of resource allocation. Technical change and changing resource and product price relationships affect efficient resource allocation patterns. This study considers possible efficient farm organizations available to farmers in southeastern Nebraska with given resources. The study determines profit maximizing farm plans for farm classes with different complements of resources and at alternative product price levels. Both crop and livestock enterprises are considered. Investment activities that generate …
The Influence Of Acreage And Yield Changes On Crop Production In Nebraska, Robert M. Finley
The Influence Of Acreage And Yield Changes On Crop Production In Nebraska, Robert M. Finley
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The general purpose of the study is to assess the impact of acreage and yield changes on total production of important Nebraska crops. A secondary purpose is to examine two different methods of imputing the influence of changes of yield and acreage on production changes.
The Economics Of Classifying Farmland Between Alternative Uses, Roger H. Willsie
The Economics Of Classifying Farmland Between Alternative Uses, Roger H. Willsie
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
At present some farm programs are aimed at reducing the acreage of land used for crop production. These programs have the objectives of reducing quantities of certain farm commodities and conserving land resources. By shifting land from the production of certain farm commodities to other commodities or to grass, total farm income may be raised and the costs of farm price support and storage programs reduced. In programs to shift land use a classification of land based on economic criteria would be useful. The primary concern of this study was with methods for identifying the economic margin between land uses; …
Effect Of Manganese And Iodine Additions In A Specific Ration For Laying Hens, F. E. Mussehl
Effect Of Manganese And Iodine Additions In A Specific Ration For Laying Hens, F. E. Mussehl
Nebraska Agricultural Experiment Station: Historical Circulars
This preliminary experiment does not answer all of the questions that are presented about manganese and iodine requirements. It can only be taken to indicate that for a typical situation with a typical ration of the type that many poultry producers use, there was no satisfactory evidence that egg production, hatchability and the viability of the hens was limited by manganese and iodine in the ration.