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Articles 31 - 60 of 101
Full-Text Articles in Agronomy and Crop Sciences
Results Of The Third International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern, K. D. Wilhelmi
Results Of The Third International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern, K. D. Wilhelmi
Nebraska Agricultural Experiment Station: Historical Research Bulletins
This is the third report of results from an International Winter Wheat Performance Nursery (IWWPN) organized in 1968 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. The nursery was designed to (1) test the adaptation of winter wheat varieties in a range of latitudes, daylengths, fertility conditions, water management, and disease complexes; (2) identify superior winter varieties to serve as recipient genotypes for high protein and high lysine genes, and (3) test the degree of expression and stability of the …
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
Nebraska Agricultural Experiment Station: Historical Research Bulletins
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.
Winter Wheat Cultivar Performance In An International Array Of Environments, J. E. Stroike, V. A. Johnson
Winter Wheat Cultivar Performance In An International Array Of Environments, J. E. Stroike, V. A. Johnson
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The International Winter Wheat Performance Nursery organized in 1968 by the Nebraska Agricultural Experiment Station in cooperation with the Agricultural Research Service, U.S. Department of Agriculture, under a contract with the Agency for International Development, U.S. Department of State, has presented a unique opportunity to measure the performance and stability of 28 winter wheat cultivars over an international array of environments. Computations of three parameters for yield, selected agronomic traits, and grain protein and lysine were made from nursery data recorded in 1969 and 1970.
Results Of The Second International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern
Results Of The Second International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The Second International Winter Wheat Performance Nursery was grown in 1970 at 38 sites in 23 countries. Four of the sites were in the southern hemisphere. Data were reported from 36 sites. The same 30 varieties evaluated in the First International Winter Wheat Performance Nursery were grown in this Second International Winter Wheat Performance Nursery. Twenty-eight varieties were winter wheats; two were spring wheats. Data on grain yield, test weight, maturity, plant height, lodging, shattering, winter survival, diseases, grain protein content and lysine content for 1970 are reported. Two-year mean data summaries also are reported.
Date Of Planting Studies Of Winter Wheat And Winter Barley In Relation To Root And Crown Rot Grain Yields And Quality, C. R. Fenster, M. G. Boosalis, J. L. Weihing
Date Of Planting Studies Of Winter Wheat And Winter Barley In Relation To Root And Crown Rot Grain Yields And Quality, C. R. Fenster, M. G. Boosalis, J. L. Weihing
Nebraska Agricultural Experiment Station: Historical Research Bulletins
This study was undertaken to determine the nature of root and crown rot of wheat and to ascertain the proper time to plant winter wheat so as to conserve moisture, minimize root and crown rot and thereby maximize yield. Studies conducted for 15 years at several locations in western Nebraska reveal that planting date is a significant factor for higher yields, particularly in certain years.
Effect Of Fertilization And Management On The Production Of Bromegrass In Northeast Nebraska, G. W. Rehm, W. J. Moline, E. J. Schwartz, R. S. Moomaw
Effect Of Fertilization And Management On The Production Of Bromegrass In Northeast Nebraska, G. W. Rehm, W. J. Moline, E. J. Schwartz, R. S. Moomaw
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Several experiments were conducted in northeast Nebraska to determine the effect of fertility and management practices on the production of smooth bromegrass (Bromus inermis Leyss). The effectiveness of the various fertilizer treatments was measured in units of dry matter produced per acre as well as beef produced per acre. Results of these studies showed that the production of bromegrass pastures in Nebraska could be markedly improved through proper fertilization.
Results Of The First International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern
Results Of The First International Winter Wheat Performance Nursery, J. E. Stroike, V. A. Johnson, J. W. Schmidt, P. J. Mattern
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The International Winter Wheat Performance Nursery was organized 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. There has been informal cooperation with the Food and Agriculture Organization, United Nations, and the International Maize and Wheat Improvement Center (CIMMYT), Mexico, D. F. Specific objectives of the nursery are to: (1) Test the adaptation of winter wheat varieties under a range of latitudes, daylengths, fertility conditions, water management and disease complexes (2) Identify superior winter varieties to serve as recipient genotypes for …
Performance Evaluation Of Some Warm-Season Prairie Grasses In Nebraska Environments, D. D. Warnes, L. C. Newell, W. J. Moline
Performance Evaluation Of Some Warm-Season Prairie Grasses In Nebraska Environments, D. D. Warnes, L. C. Newell, W. J. Moline
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Objectives of these experiments were to study and compare establishment of stands, fertility responses, and forage yields of certain warm-season grass varieties and experimental strains in Nebraska locations which differed in soil and climatic conditions.
Growing Season Air-Soil Temperature Relationships At Lincoln, Nebraska, Ralph E. Neild
Growing Season Air-Soil Temperature Relationships At Lincoln, Nebraska, Ralph E. Neild
Nebraska Agricultural Experiment Station: Historical Research Bulletins
This study concerns the use of weekly average air temperature for predicting weekly average soil temperature under different conditions of surface cover during different times of year. Probabilities of weekly average air temperature for Lincoln as well as other Nebraska locations are available. These probabilities and the soil temperature prediction equations may be used in determining expected soil temperatures.
Cultural Practices For Seed Production From Established Stands Of Western Wheatgrass, D. E. Smika, L. C. Newell
Cultural Practices For Seed Production From Established Stands Of Western Wheatgrass, D. E. Smika, L. C. Newell
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Fertilization and irrigation requirements and aftermath removal practices for maximum seed production from solid stand western wheatgrass were studied for three years near Oakley, Kansas. Conclusions from this study indicate that to obtain maximum quantity of highest quality western wheatgrass seed from established stands, the grass must be fertilized in the fall with at least 80 pounds of nitrogen per acre. Irrigation with sufficient water to fill the root zone in either the fall or early spring and again when the grass is in " boot" or heading is necessary. The practice of removing the aftermath following harvest by mowing …
Irrigation And Fertilization Practices For Seed Production From Established Stands Of Side-Oats Grama, D. E. Smika, L. C. Newell
Irrigation And Fertilization Practices For Seed Production From Established Stands Of Side-Oats Grama, D. E. Smika, L. C. Newell
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The objectives of this study of grass seed production were to determine the response of an established stand of a warm-season grass to irrigation and fertilizer practices with regard to the specific practices needed to produce maximum quantity of adequate quality seed per acre. Side-oats grama was chosen for the study because of the availability of adapted varieties.
Appraisal For Combined Pea Aphid And Spotted Alfalfa Aphid Resistance In Alfalfa, W. L. Howe, W. R. Kehr, C. O. Calkins
Appraisal For Combined Pea Aphid And Spotted Alfalfa Aphid Resistance In Alfalfa, W. L. Howe, W. R. Kehr, C. O. Calkins
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Sources of combined resistance to spotted alfalfa and pea aphids were found in Ranger alfalfa and its parental strains, foreign plant introductions, clones and their progenies. Ranger alfalfa appeared to be a good source for selection of plants with resistance to both aphids.
Sulfur Fertilizers For Alfalfa Production In Nebraska, R. L. Fox, A. D. Flowerday, F. W. Hosterman, H. F. Rhoades, R. A. Olson
Sulfur Fertilizers For Alfalfa Production In Nebraska, R. L. Fox, A. D. Flowerday, F. W. Hosterman, H. F. Rhoades, R. A. Olson
Nebraska Agricultural Experiment Station: Historical Research Bulletins
In order to elaborate all aspects of the sulfur problem in alfalfa production, a series of field, greenhouse and laboratory experiments was initiated to determine: 1. The influence of sulfur fertilization on the yield of alfalfa in Nebraska. 2. The influence of sulfur fertilization on the protein, vitamin A, and sulfur contents of alfalfa. 3. The sulfur supplying capacities of various soils under field and greenhouse conditions. 4. The sulfur content of precipitation at widely scattered points in Nebraska. 5. Soil properties associated with sulfur deficiency. 6. Optimum methods for estimating the sulfur status of soils by soil testing. The …
Performance Of Alfalfas Under Five Management Systems, W. R. Kehr, E. C. Conard, M. A. Alexander, F. G. Owen
Performance Of Alfalfas Under Five Management Systems, W. R. Kehr, E. C. Conard, M. A. Alexander, F. G. Owen
Nebraska Agricultural Experiment Station: Historical Research Bulletins
This bulletin reports stands, forage yields, and other agronomic data on alfalfas of diverse origin or type tested under five management systems at Lincoln, Nebraska. Narrow-crowned and broad-crowned types were tested. The management systems involved non-irrigated alfalfa-bromegrass tests (a) continuously grazed with steers, (b) cut for hay, and (c) rotationally grazed with sheep; an irrigated alfalfa-bromegrass test rotationally grazed with dairy cattle; and irrigated tests of alfalfas in pure stands cut for hay.
Studies Of The Mechanisms And Sources Of Spotted Alfalfa Aphid Resistance In Ranger Alfalfa, W. L. Howe, W. R. Kehr, M. E. Mcknight, G. R. Manglitz
Studies Of The Mechanisms And Sources Of Spotted Alfalfa Aphid Resistance In Ranger Alfalfa, W. L. Howe, W. R. Kehr, M. E. Mcknight, G. R. Manglitz
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Mechanisms and sources of spotted alfalfa aphid resistance in Ranger alfalfa and its five parental strains were investigated during 1957-1960.
Relationship Of Self-Fertility, Pollen Abortion, And Micronuclei Number To Agronomic Performance In Alfalfa, P. P. Rotar, W. R. Kehr
Relationship Of Self-Fertility, Pollen Abortion, And Micronuclei Number To Agronomic Performance In Alfalfa, P. P. Rotar, W. R. Kehr
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The purpose of this investigation was to study self-fertility, pollen abortion, and meiosis in a randomly selected population of Ranger alfalfa clones and their polycross progenies, and to relate such information to agronomic data obtained on the same materials.
Side-Oats Grama In The Central Great Plains, L. C. Newell, R. D. Staten, E. B. Jackson, E. C. Conard
Side-Oats Grama In The Central Great Plains, L. C. Newell, R. D. Staten, E. B. Jackson, E. C. Conard
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Side-oats grama, Bouteloua curtipendula (Michx.) Torr., is a warm-season grass distributed widely in the native grasslands of continental United States. It has long been considered a valuable forage grass. Its habit of growth and favorable seed-producing qualities have suggested its suitability for domestication as a pasture crop. Investigations which contributed to the domestication of side-oats grama were conducted at the Nebraska Agricultural Experiment Station in a 12-year period, 1948 to 1960. Field trials were carried on to evaluate forage and seed yields of selected strains and varieties from different regions. The photoperiodic responses of these strains were studied under controlled …
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
Nebraska Agricultural Experiment Station: Historical Research Bulletins
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.
The Performance Of Alfalfa Synthetics In The First And Advanced Generations, W. R. Kehr, H. O. Graumann, C. C. Lowe, C. O. Gardner
The Performance Of Alfalfa Synthetics In The First And Advanced Generations, W. R. Kehr, H. O. Graumann, C. C. Lowe, C. O. Gardner
Nebraska Agricultural Experiment Station: Historical Research Bulletins
During alfalfa breeding investigations conducted at the Nebraska Agricultural Experiment Station, numerous superior clones were selected and tested as clones, and in polycross progeny tests. Information was needed on the performance of synthetic varieties in the first and advanced generations, on the optimum number of clones to include in a synthetic variety, and on parent-progeny relationships. Clones with high general combining ability for forage yield as measured by polycross progeny tests, and in certain instances specific combining ability based on single-cross tests, were intercrossed in various ways to produce synthetic varieties. A group of synthetics varying in number of parents …
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
Nebraska Agricultural Experiment Station: Historical Research Bulletins
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 …
Genetic Studies Of Winter Hardiness In Barley, C. R. Rohde, C. F. Pulham
Genetic Studies Of Winter Hardiness In Barley, C. R. Rohde, C. F. Pulham
Nebraska Agricultural Experiment Station: Historical Research Bulletins
An important obstacle toward the development of winter barley varieties with a higher level of winter hardiness has been the deficiency of genetic information on this character. The primary objective of these studies was to obtain information on the genetics of the winter hardiness of a group of 18 winter barley varieties which originated from widely different geographic areas of the world. It was hoped that this information might be helpful in determining whether or not it would be possible for barley breeders to combine different genetic sources of winter hardiness and attain a higher level of hardiness than presently …
The Significance Of Xenia Effects On The Kernel Weight Of Corn, T. A. Kiesselbach
The Significance Of Xenia Effects On The Kernel Weight Of Corn, T. A. Kiesselbach
Nebraska Agricultural Experiment Station: Historical Research Bulletins
The purpose of this paper is to appraise the xenia effects of the pollen parent on the kernel weight of corn (Zea mays L.), and to interpret so far as possible their genetic, physiologic and applied significance. The conclusions will be based on local experiments and a review of the literature.
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
Nebraska Agricultural Experiment Station: Historical Research Bulletins
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.
Origin And Performance Of Ranger Alfalfa, W. R. Kehr
Origin And Performance Of Ranger Alfalfa, W. R. Kehr
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Ranger alfalfa was developed through the cooperative efforts of personnel of the United States Department of Agriculture and the Nebraska Agricultural Experiment Station and released for seed increase in 1940. It is a winter-hardy, bacterial wilt resistant variety synthesized from five basic strains selected from Cossack, Turkistan and Ladak. Breeding methods used in the development of this variety were described in detail. Research results obtained on the performance of the basic strains and on the seed lots, produced under certification procedures, in controlled wilt and cold tests and forage yield trials under field conditions at the Nebraska station were presented …
Effect Of Time Of Cutting On Yield And Botanical Composition Of Prairie Hay In Southeastern Nebraska, Elverne C. Conard, Vincent H. Arthaud
Effect Of Time Of Cutting On Yield And Botanical Composition Of Prairie Hay In Southeastern Nebraska, Elverne C. Conard, Vincent H. Arthaud
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Approximately three and one-third million acres of native prairie are harvested annually in Nebraska for hay. In the four-year period 1948-1951, the State ranked first in wild hay production with an average yield of more than two and one-quarter million tons per year. This crop is an important natural resource in Nebraska's livestock industry. Studies were initiated in 1945 to determine the effects of time of cutting on the yield and feeding value of prairie hay in southeastern Nebraska. The studies were continued through the summer of 1952 to determine the effects of different cutting treatments on the vigor and …
Rate Of Potato Tuber Growth On Dryland At The Box Butte Experiment Farm, H. O. Werner
Rate Of Potato Tuber Growth On Dryland At The Box Butte Experiment Farm, H. O. Werner
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Relatively late planting of potatoes, i.e., between June 12 and 25, has become the prevailing practice in the dryland areas of western Nebraska. Late planting distinctly improves the color and type of tubers, and reduces losses due to insects and diseases (especially soil-borne diseases caused by Fusarium and Streptomyces). Growers must decide each year whether the increase in yield and tuber maturity gained by delaying harvest will be offset by the risk of impaired tuber quality due to scab or possible serious field frost damage. Information about the rate at which tubers are developing by various dates is essential …
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
Nebraska Agricultural Experiment Station: Historical Research Bulletins
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.
Commercial Fertilizers For Winter Wheat In Relation To The Properties Of Nebraska Soils, R. A. Olson, H. F. Rhoades
Commercial Fertilizers For Winter Wheat In Relation To The Properties Of Nebraska Soils, R. A. Olson, H. F. Rhoades
Nebraska Agricultural Experiment Station: Historical Research Bulletins
It is the purpose of this bulletin to report the investigations that have been made correlating soil properties and fertilization practices with yields of winter wheat. Since the success or failure of fertilization practices is so dependent on specific soil conditions, an attempt has been made here to further characterize the major soils of the different sections of the state which are devoted to wheat production and to analyze fertilizer practices and results in relation to the soil properties determined. The data are summarized for the four sections of the state designated as southeastern, east-south-central, west-south-central and western Nebraska. These …
Inheritance Of Sterility, Flower Color, Spinelessness, Attached Pappus And Rust Resistance In Safflower, Carthamus Tinctorius, Carl E. Claassen
Inheritance Of Sterility, Flower Color, Spinelessness, Attached Pappus And Rust Resistance In Safflower, Carthamus Tinctorius, Carl E. Claassen
Nebraska Agricultural Experiment Station: Historical Research Bulletins
Since literature pertaining to breeding and inheritance in safflower was found to be very limited, fundamental research was instituted to determine: (A) a method for making controlled crosses, (B) the amount of natural crossing that occurs, (C) the association of oil content of seed with other seed and plant characteristics, and (D) the mode of inheritance of sterility, flower color, spinelessness, attached pappus and rust resistance. Results on natural and controlled crossing in safflower and the association of oil content in seed with other plant and seed characteristics have been reported. It is the purpose of this bulletin to report …
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
Nebraska Agricultural Experiment Station: Historical Research Bulletins
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.