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Articles 1 - 25 of 25
Full-Text Articles in Agriculture
Pesticide Use On Crops In Nebraska - 1987, Maurice Baker, Nancy Peterson, Shripat T. Kamble
Pesticide Use On Crops In Nebraska - 1987, Maurice Baker, Nancy Peterson, Shripat T. Kamble
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This is the third and most comprehensive study of pesticide use on crops in Nebraska. The first was completed in 1978 and the second one in 1982. The first study indicated that approximately 25 million pounds (11.34 million kg) of active ingredients were used on the major crops in Nebraska. This increased to approximately 30.2 million pounds (13.7 million kg) in 1982. The USDA requires accurate information to meet their responsibilities. Thus, this survey was undertaken to determine: 1) the use of pesticides on crops, pasture and rangeland and 2) to identify pest management practices.
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 …
Effects Of No-Tillage Fallow As Compared To Conventional Tillage In A Wheat-Fallow System, C. R. Fenster, G. A. Peterson
Effects Of No-Tillage Fallow As Compared To Conventional Tillage In A Wheat-Fallow System, C. R. Fenster, G. A. Peterson
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
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 First High Protein-High Lysine Wheat Observation Nursery Grown In 1975, K. D. Wilhelmi, S. L. Kuhr, V. A. Johnson, P. J. Mattern
Results Of The First High Protein-High Lysine Wheat Observation Nursery Grown In 1975, K. D. Wilhelmi, S. L. Kuhr, V. A. Johnson, P. J. Mattern
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This is the first report of results from a high protein-high lysine observation (HP-HL) nursery organized in 1974 by the Nebraska Agricultural Experiment Station and the Agricultural Research Service, 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.
Reevaluation Of Common Wheats From The Usda World Wheat Collection For Protein And Lysine Content, K. P. Vogel, V. A. Johnson, P. J. Mattern
Reevaluation Of Common Wheats From The Usda World Wheat Collection For Protein And Lysine Content, K. P. Vogel, V. A. Johnson, P. J. Mattern
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The protein and lysine content of wheat can be altered by breeding only if genetic variability exists for these traits. Lysine is a nutritionally limiting amino acid in wheat protein. Protein and lysine analyses of the common wheats of the USDA World Wheat Collection indicated that variability does exist for these traits. Some of the variability for protein and lysine among wheats of the World Collection may not be genetic in origin, because all the 12,000 wheats analyzed were not grown in the same environment. The purpose of this study was to reevaluate selected lines from the World Wheat Collection …
Results Of Systematic Analyses For Protein And Lysine Composition Of Common Wheats (Triticum Aestivum L.) In The Usda World Collection, K. P. Vogel, V. A. Johnson, P. J. Mattern
Results Of Systematic Analyses For Protein And Lysine Composition Of Common Wheats (Triticum Aestivum L.) In The Usda World Collection, K. P. Vogel, V. A. Johnson, P. J. Mattern
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Protein and lysine contents of 12,613 common wheats of the USDA World Wheat Collection were determined in order to identify wheats that may be sources of genes for high protein and high lysine. Results indicate that significant genetic differences in protein and lysine content probably exist among world collection common wheats. Selection criteria have been developed for further evaluation of World Collection lines high in protein and lysine content.
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 …
The Biology And Ecology Of Trogoderma Glabrum (Herbst) In Stored Grains, Benjamin H. Kantack, Robert Staples
The Biology And Ecology Of Trogoderma Glabrum (Herbst) In Stored Grains, Benjamin H. Kantack, Robert Staples
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
These investigations were undertaken to determine the distribution and importance of Trogoderma glabrum (Herbst) in stored grain in Nebraska, the ecological factors favoring population increase in stored wheat, corn, and sorghum, and the role T. glabrum might play in disseminating internally the Aspergillus molds commonly encountered in stored grain.
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; …
Yields In Different Cropping Systems And Fertilizer Tests Under Stubble Mulching And Plowing In Eastern Nebraska, F. L. Duley
Yields In Different Cropping Systems And Fertilizer Tests Under Stubble Mulching And Plowing In Eastern Nebraska, F. L. Duley
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The material in this report will be confined chiefly to studies on crop production with stubble-mulching compared with plowing. Major cash crops have been studied in different rotations including legumes and non-legume crops. In all tests, plowing has been compared with subsurface tillage. Different types of equipment have been devised and tested for the various operations during the course of these studies.
Streak Mosaic Of Wheat In Nebraska And Its Control, R. Staples, W. B. Allington
Streak Mosaic Of Wheat In Nebraska And Its Control, R. Staples, W. B. Allington
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
This bulletin reports the results of studies on the epidemiology of wheat streak mosaic under Nebraska conditions. Particular attention is given to the occurrence and certain characteristics of the mite vector of the virus, the relation of weather and other factors to some of its activities, a correlation of certain mite situations with epidemics of the disease, and recommendations for disease control.
The Utilization Of Food Elements By Growing Chicks. Xi. A Comparison Of Ground Wheat And Ground Rye In Rations For Growing Chicks, C. W. Ackerson, W. E. Ham, F. E. Mussehl
The Utilization Of Food Elements By Growing Chicks. Xi. A Comparison Of Ground Wheat And Ground Rye In Rations For Growing Chicks, C. W. Ackerson, W. E. Ham, F. E. Mussehl
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
1. The effect of replacing the shorts and bran of a standard ration by ground wheat or ground rye was studied with two lots of newly hatched chicks. 2. Comparisons were made on the basis of equal intakes of dry matter and nitrogen by all chicks. 3. The wheat-fed lot made a significantly greater gain than the rye-fed lot. 4. Several cases of curled-toe paralysis occurred in the two lots, and a tendency to cannibalism appeared in the rye-fed lot.
Nitrate Production As Affected By Grain-Crop Residues On The Surface Of The Soil, T. M. Mccalla, J. C. Russel
Nitrate Production As Affected By Grain-Crop Residues On The Surface Of The Soil, T. M. Mccalla, J. C. Russel
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The purpose of this bulletin is to present the data on nitrate contents and nitrate production in tests where straw or stalk residues were left on the surface through subsurface tillage, as compared with check treatments where these residues were plowed under or were absent. Nine of these tests were at Lincoln, Nebraska, and one was at the Hastings, Nebraska, Hydrological Project. Two tests were conducted in 1939, four in 1941, and four in 1942.
The Differential Reaction Of Strains Within A Variety Of Wheat To Physiologic Forms Of Puccinia Graminis Tritici, T. A. Kiesselbach, George L. Peltier
The Differential Reaction Of Strains Within A Variety Of Wheat To Physiologic Forms Of Puccinia Graminis Tritici, T. A. Kiesselbach, George L. Peltier
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Black stem rust of wheat (Puccinia graminis tritici (Pers.) Erikss. & Henn.), which occurs in Nebraska and thruout most of the wheat producing regions of the world, is of a composite nature, in that it consists of a number of physiologic forms which can be determined by their action on different varieties of Triticum species, as shown by Stakman and Levine. The ordinary commercial variety of wheat may likewise be regarded as a mixture, in that it consists of numerous strains, which differ in some more or less important characteristics, as has been frequently indicated in the literature concerning …
A Study Of The Environmental Conditions Influencing The Development Of Stem Rust In The Absence Of An Alternate Host. Iv. Overwintering Of Urediniospores Of Puccinia Graminis Tritici. V. The Period Of Initial Infection Of Urediniospores Of Puccinia Graminis Tritici On Wheat. Vi. Influence Of Light On Infection And Subsequent Development Of Urediniospores Of Puccinia Graminis Tritici On Wheat, George L. Peltier
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
IV. In order to ascertain whether the urediniospores of Puccinia graminis tritici (Pers.) Erikss. and Henn. overwinter under the environmental conditions prevailing at Lincoln, Nebraska, a series of experiments was carried out extending over a period of 5 years. The results of this investigation are briefly presented. V. By the period of initial infection is meant the time required by a pathogen after it reaches a susceptible plant part to enter the tissues. To determine what the period of initial infection of urediniospores of Puccinia graminis tritici might be, experiments were undertaken during the season of 1923-24 using urediniospores of …
A Study Of The Environmental Conditions Influencing The Development Of Stem Rust In The Absence Of An Alternate Host. Iii. Further Studies Of The Viability Of Urediniospores Of Puccinia Graminis Tritici, George L. Peltier
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
1. The influence of relative humidity and temperature on the viability of the urediniospores of two Physiologic Forms of Puccinia graminis tritici has been determined. 2. The same general relation between the viability of the urediniospores and the relative humidity and temperature was found, namely, that the lower the temperature the longer the spores retained their viability at all relative humidities, while at any stated temperature the spores were viable the longest at the medium humidities. 3. Urediniospores of Physiologic Form XXI held at 49.0 per cent relative humidity and maintained at a temperature of 5° C. when tested for …
A Study Of The Environmental Conditions Influencing The Development Of Stem Rust In The Absence Of An Alternate Host. Ii. Infection Studies With Puccinia Graminis Tritici Form Iii And Form Ix, George L. Peltier
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Stakman and Levine have shown that Puccinia graminis tritici (Pers.) Erikss. and Henn. consists of a number of biologic forms, which can be determined by their action on different varieties of Triticum species. To date 37 such biologic forms have been identified by them through the parasitic action on 12 differential hosts chosen from a large number of varieties of Triticum species. To determine whether these biologic forms remain constant in their behavior under various environmental conditions, a detailed study of the host-parasite relation was undertaken with 2 of these forms. At the same time an opportunity was afforded to …
A Study Of The Environmental Conditions Influencing The Development Of Stem Rust In The Absence Of An Alternate Host. I. The Viability Of The Urediniospores Of Puccinia Graminis Tritici Form Iii, George L. Peltier
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
No exact data are at hand regarding the influence of temperature and relative humidity on the viability of the urediniospores of stem rust under controlled conditions. 1. The influence of relative humidity on the viability of the urediniospores of Puccinia graminis tritici Form III is very pronounced and closely associated with temperature. 2. At high relative humidities, depending somewhat on the temperature, the percentage of germination is low and the period over which the spores are viable is very short. 3. The same relation exists at the low relative humidities except that it is not so pronounced and is more …
Studies Concerning The Elimination Of Experimental Error In Comparative Crop Tests, T. A. Kiesselbach
Studies Concerning The Elimination Of Experimental Error In Comparative Crop Tests, T. A. Kiesselbach
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
It is apparent that many sources of error have unconsciously entered into comparative crop yield tests. The very important matter of overcoming variation in soil conditions as a source of experimental error has been quite extensively studied and reported by various investigators during the past decade. The means suggested for reducing such error have been (1) repetition of plats and (2) correction of yields according to check plats planted to a uniform variety or treatment at stated intervals. Both methods have proved of value and a combination of both may often be used advantageously. Some danger always exists of error …
Relation Of Size Of Seed And Sprout Value To The Yield Of Small Grain Crops, T. A. Kiesselbach, C. A. Helm
Relation Of Size Of Seed And Sprout Value To The Yield Of Small Grain Crops, T. A. Kiesselbach, C. A. Helm
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
A superior yielding power has frequently been attributed to the extra large seed. Since the seeds of any given crop commonly differ markedly in size, it is of importance from the standpoint of crop production to know the extent to which this difference in size may affect the yield of the crop produced. The following experiments have been conducted for the purpose of contributing further to the information upon this subject.