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Articles 1 - 26 of 26
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.
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 …
Sulfur Fertilization Of Alfalfa And Corn On The Sandy Soils Of Nebraska, G. W. Rehm
Sulfur Fertilization Of Alfalfa And Corn On The Sandy Soils Of Nebraska, G. W. Rehm
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Objectives of these studies were: 1. To determine the effect of various S fertilizers and rates of S application on the yield of both alfalfa and corn grown on sandy soils. 2. To determine the residual effects of a single application of S fertilizer on the production of alfalfa. 3. To measure the influence of S fertilizers and the rate of S applied on the S content of corn and alfalfa tissue and S uptake by these two crops. 4. To develop a soil testing procedure which accurately predicts the requirement for the application of S fertilizers to alfalfa and …
Bionomics Of Insects Associated With Corn In The Nebraska Sandhills, J. L. Wedberg, J. B. Campbell, T. J. Helms
Bionomics Of Insects Associated With Corn In The Nebraska Sandhills, J. L. Wedberg, J. B. Campbell, T. J. Helms
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Investigations were conducted in the Nebraska Sandhills to determine the impact of transition from grassland to irrigated corn on selected insect species, to identify indigenous species that may be economically important to corn production, and to provide a point of reference for future development of pest management programs for irrigated corn.
Leaf Freckles And Wilt Of Corn Incited By Corynebacterium Nebraskense Schuster, Hoff, Mandel, Lazar, 1972, M. L. Schuster
Leaf Freckles And Wilt Of Corn Incited By Corynebacterium Nebraskense Schuster, Hoff, Mandel, Lazar, 1972, M. L. Schuster
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The new bacterial disease Leaf Freckles and Wilt (LFW) of corn (Zea mays L.) was first observed in 1969 on two farms in southcentral Nebraska. Since then it has spread to other areas in the state. LFW is a serious disease on farms in six Nebraska counties (Clay, Custer, Dawson, Furnas, Hall and Phelps) and has been found in isolated cases in at least 28 other counties. In 1971 LFW was found in a seedcorn field in western Iowa, in 1973 in two Kansas counties, and in 1974 in South Dakota and Colorado. Because of its explosive nature, several …
Evaluating Economic Efficiency By Relative Price Analysis (Feed, Livestock And Product Sectors), J. Y. Chen, J. B. Hassler
Evaluating Economic Efficiency By Relative Price Analysis (Feed, Livestock And Product Sectors), J. Y. Chen, J. B. Hassler
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The specific objective of this research is to delineate efficient and inefficient economic performance areas and thereby locate the more significant problem aspects for research and program attention. Specific price analyses will be used to evaluate the price interrelationships for functional efficiency in the dimensions of space, form and time. Not only the efficient aspects of production and marketing will be indicated by the analyses but the inefficient aspects of economic performance will be stressed also. This research will provide some foundational information for making decisions, both public and private. Moreover, it will direct the attention of researchers or program …
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.
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 Effects Of Irradiating Dormant Maize Seeds With Xrays And Thermal Neutrons, Rosalind Morris, E. F. Frolik
The Effects Of Irradiating Dormant Maize Seeds With Xrays And Thermal Neutrons, Rosalind Morris, E. F. Frolik
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
In 1951 a research program was started at the University of Nebraska to compare the developmental effects of thermal neutrons and X rays on different crop seeds. Three crops, barley, tomato and maize, were chosen for additional information involving induced chromosomal aberrations and seedling mutations. The maize investigations are presented in this bulletin, along with a comparison among the three crops with respect to irradiation effects.
Progress From Recurrent Selection Procedures For The Improvement Of Corn Populations, John H. Lonnquist
Progress From Recurrent Selection Procedures For The Improvement Of Corn Populations, John H. Lonnquist
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The possibilities of developing synthetic varieties suitable for the fringe areas of the corn belt, where cost of hybrid seed is high relative to the value of the expected crop, and in areas where hybrid corn might not be a feasible approach for other reasons, made it seem a worthwhile objective for study. Effort has been made in recent years to increase the productivity of hybrid combinations through selection of new superior lines using standard breeding procedures. The limited progress realized has resulted in an increased interest in the possible use of alternate methods for the development of superior germplasm …
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.
The Effects Of Thermal-Neutron Irradiation Of Maize And Barley Kernels, John W. Schmidt, E. F. Frolik
The Effects Of Thermal-Neutron Irradiation Of Maize And Barley Kernels, John W. Schmidt, E. F. Frolik
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
It is the purpose of this paper to report the effects of thermal-neutron irradiation of maize and barley kernels on subsequent germination, plant establishment, and early plant development. Comparisons are made with equivalent neutron treatments of maize pollen, results of which have been reported in part in previous publications.
Progressive Development And Seasonal Variations Of The Corn Crop, T. A. Kiesselbach
Progressive Development And Seasonal Variations Of The Corn Crop, T. A. Kiesselbach
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The chief purpose of these studies has been to determine the normal growth changes that occur in the corn plant at successive intervals when growing in the field, and to observe annual yield variations in relation to prevailing weather conditions. Aside from supplying information regarding the physiology of this crop, the data are of interest to the corn grower because they indicate comparative yields, shelling percentages, moisture contents, and feed constituents at various stages of development. Some data also are presented concerning the effects of frost, drouth, day length, and the economic value of tillers and seminal roots.
The Structure And Reproduction Of Corn, T. A. Kiesselbach
The Structure And Reproduction Of Corn, T. A. Kiesselbach
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The primary purpose of this paper is to summarize investigations concerning the structure and reproduction of the corn plant (Zea mays L.). Because of wide interest in the reproductive process in connection with breeding and genetic studies the floral development, fertilization, and embryology are especially stressed. The morphology and development of the vegetative organs is also included. The botanical relationship, origin, genetics and breeding of corn are briefly considered.
Pollination Cycles And Pollen Dispersal In Relation To Grass Improvement, Melvin D. Jones, L. C. Newell
Pollination Cycles And Pollen Dispersal In Relation To Grass Improvement, Melvin D. Jones, L. C. Newell
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The plant breeder is initially concerned with gaining a knowledge of the breeding behavior of his plant materials in order that improvement may be undertaken effectively. It is important to know the different characteristic pollination habits of these plants. To develop and apply techniques applicable to the improvement of a given grass crop, it is desirable to know the time of day and the number of days that the grass sheds pollen. The effects of temperature, humidity, light, and wind on pollination must be considered. Once superiority of germplasm is obtained, the most important consideration is the maintenance of this …
Charcoal Rot Of Corn And Sorghum, J. E. Livingston
Charcoal Rot Of Corn And Sorghum, J. E. Livingston
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
In Nebraska, the charcoal rot caused considerable damage to the 1940 grain sorghum crop in the south central counties, and the following year it caused serious lodging and reduction of yield in both corn and sorghum in all sections of the state. Field observations indicated that some varieties of sorghum were damaged less than others; thus it appeared desirable to test thoroughly all varieties to determine whether any were sufficiently resistant to be recommended for field planting or to be used in a breeding program. It seemed desirable to study the influence of soil environment on infection and the development …
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 Vitamin A Content Of Soybean Silage And Of A.I.V., Molasses, And Common Corn Silages, And The Effect Of Feeding These Materials Upon The Vitamin A Content Of Milk, I. L. Hathaway, H. P. Davis, J. C. Brauer
The Vitamin A Content Of Soybean Silage And Of A.I.V., Molasses, And Common Corn Silages, And The Effect Of Feeding These Materials Upon The Vitamin A Content Of Milk, I. L. Hathaway, H. P. Davis, J. C. Brauer
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
A study was made of the vitamin A content of soybean silage, and of A.l.V., molasses, and common corn silage. The silages were fed to groups of cows and the vitamin A content of their milk determined. The vitamin A determinations were made by feeding the silage or the milk to groups of rats whose body stores of this vitamin had been depleted by being fed a vitamin-A-deficient ration. Approximately 780 rats were used in these experiments. There were no apparent ill effects of feeding as much as 3.2 grams of the A.l.V. silage per rat per day for eight …
Root Development Of Young Delicious Apple Trees As Affected By Soils And By Cultural Treatments, W. W. Yocum
Root Development Of Young Delicious Apple Trees As Affected By Soils And By Cultural Treatments, W. W. Yocum
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The major problem of this investigation was to determine the effects of different cultural treatments and soil conditions upon the depth and lateral spread of the root systems of young Delicious apple trees during the first three years in the orchard. This study was conducted during the years 1932 to 1934 inclusive.
A Key To The Nebraska Cutworms And Armyworms That Attack Corn, Don B. Whelan
A Key To The Nebraska Cutworms And Armyworms That Attack Corn, Don B. Whelan
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The following key to the Nebraska cutworms and armyworms injurious to corn is based upon structural characters supplemented in some instances by color. Not all of the species in this key have been found in Nebraska; some are included because they are to be found in near-by states to such an extent that they probably are present in this state.
Nutrient Requirements Of Growing Chicks, F. E. Mussehl
Nutrient Requirements Of Growing Chicks, F. E. Mussehl
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The object of our experimental work was to establish if possible certain principles of poultry nutrition, permitting later a better combination of natural feedstuffs with the highest growth efficiency.
Corn Investigations, T. A. Kiesselbach
Corn Investigations, T. A. Kiesselbach
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The purpose of the investigations reported in this bulletin has been primarily to determine some of the underlying principles involved in corn improvement. The work comprises a study of some of the physiological characteristics of the crop together with a comparison of various selection, breeding, and cultural practices in their relation to grain yield.
The Regional Adaptation Of Corn In Nebraska, T. A. Kiesselbach, F. D. Keim
The Regional Adaptation Of Corn In Nebraska, T. A. Kiesselbach, F. D. Keim
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The purpose of this investigation was to determine some of the factors involved in the regional adaptation of corn. The procedure has been to make a comparative study of native corn types, known to be locally adapted to various regional areas in Nebraska through long growth there. The work has been confined to the single species group - Zea mays indentata. No one variety of a common source is grown throughout the state, and therefore it has been impossible to keep within a single variety. It would appear that the data should indicate morphological and histological plant characteristics involved …
Freezing Injury Of Seed Corn, T. A. Kiesselbach, J. A. Ratcliff
Freezing Injury Of Seed Corn, T. A. Kiesselbach, J. A. Ratcliff
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The object of the investigations in this bulletin has been to determine the conditions under which freezing injury may occur to seed corn; to indicate, if possible, the vital changes in the embryo resulting in such injury; and to point out ways by which seed corn of strong vitality and satisfactory yielding capacity may be obtained.
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 …
Transpiration As A Factor In Crop Production, T. A. Kiesselbach
Transpiration As A Factor In Crop Production, T. A. Kiesselbach
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
The object of experiments reported in this bulletin has been to determine principles according to which water is used by crops. In many agricultural districts, water is frequently a seriously limiting factor in crop production. It has been thought that some means might be devised through a correct understanding of the principles involved, whereby economy in the use of water in farm practice could be increased. In this effort there are two chief points of attack, namely, (1) adjusting the external factors to the needs of the plant, and (2) selecting plants adapted to the conditions.