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Full-Text Articles in Life Sciences
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
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
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.
The Inhibition Of Seedling Growth By Crop Residues In Soil Inoculated Wlth Penicillium Urticae Bainer, D. E. Behmer, T. M. Mccalla
The Inhibition Of Seedling Growth By Crop Residues In Soil Inoculated Wlth Penicillium Urticae Bainer, D. E. Behmer, T. M. Mccalla
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
In the Great Plains area of the United States, stubble-mulch practices have been widely used in the control of soil erosion by wind or water. Although this method of leaving crop residue on the surface has been very effective in combating erosion, depressed plant growth and reduced grain yield have often occurred in wet years. Similar growth problems have been observed during unseasonably cool, wet springs in field experiments at Lincoln, Nebraska. Because increased numbers of certain micro-organisms occur immediately beneath a decomposing surface mulch, the production of phytotoxic compounds under these conditions may well have been associated with the …
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
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
Mechanisms and sources of spotted alfalfa aphid resistance in Ranger alfalfa and its five parental strains were investigated during 1957-1960.
Effect Of Genotype And Growth Stage On Distribution Of Melilotic Acid, O-Coumaric Acid, And Coumarinic Acid In Melilotus Alba Desr., Walter R. Akeson, Herman J. Gorz, Francis A. Haskins
Effect Of Genotype And Growth Stage On Distribution Of Melilotic Acid, O-Coumaric Acid, And Coumarinic Acid In Melilotus Alba Desr., Walter R. Akeson, Herman J. Gorz, Francis A. Haskins
Department of Agronomy and Horticulture: Faculty Publications
Percentages of melilotic acid, o-coumaric acid, and coumarinic acid were highest in leaves, intermediate in stems. and lowest in roots of greenhouse-grown sweetclovcr plants of the CuCuBB genotype. In leaves, percentages of each of the three compounds decreased as the leaves grew older. but amounts per leaflet increased with age except for content of o-coumaric acid, in which a brief increase was followed by a sharp decrease. Seed from plants of the Cu phenotype was higher in content of each of the three compounds than seed from cu plants. Levels of o-coumaric and coumarinic acids were much …
Glucosides Of Coumarinic And O-Coumaric Acids In The Tonka Bean, Francis A. Haskins, H. J. Gorz
Glucosides Of Coumarinic And O-Coumaric Acids In The Tonka Bean, Francis A. Haskins, H. J. Gorz
Department of Agronomy and Horticulture: Faculty Publications
The β-glucosides of coumarinic and o-coumaric acids were detected in extracts of cotyledons, exocarps, and seedling leaves of the tonka bean. The existence of these compounds and the presence of a β-glucosidase having specificity for coumarinyl glucoside suggest that, the tonka bean synthesizes coumarin by a pathway similar to the one found in sweetclover.
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
Historical Research Bulletins of the Nebraska Agricultural Experiment Station
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.
The Wonderful Prairie Sod, J. E. Weaver
The Wonderful Prairie Sod, J. E. Weaver
Department of Agronomy and Horticulture: Faculty Publications
A magnificent expanse of grassland occupied the central part of North America before the coming of the white man. This paper is the result of a continuous investigation which began in 1916 of a large portion of this prairie. The area of most intensive study included approximately the western third of Iowa and the eastern third of Nebraska. The advent of the great drought of 1933 to 1940 offered an exceptional opportunity to ascertain the responses of native plants to extremely adverse conditions. The role played by rhizomes of grasses in endurance of drought and frequently their recovery from it …