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Full-Text Articles in Life Sciences
Tillage And Fertilizer Influences On Corn And Legume Cover, J. E. Gilley, J. F. Power, P. J. Reznicek, S. C. Finkner
Tillage And Fertilizer Influences On Corn And Legume Cover, J. E. Gilley, J. F. Power, P. J. Reznicek, S. C. Finkner
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
The use of legumes in a cropping system may provide a variety of benefits. In this study, the effectiveness of selected legume species in providing surface cover was examined. The legumes were interseeded into either conventional or no-till corn, with or without N fertilizer. Both maximum legume cover and maximum cover furnished by corn plus legumes were examined. Mean cover provided during the study period by both the cover crop, and corn plus cover crop was also determined.
Can Genetically Engineered Crops Become Weeds?, Kathleen H. Keeler
Can Genetically Engineered Crops Become Weeds?, Kathleen H. Keeler
School of Biological Sciences: Faculty Publications
There are significant differences if the distribution of weedy characteristics among weeds, normal plants, and crops. The world’s most serious weeds possess on the average 10 or 11 of these characters, a random collection of British plants have an average seven of the traits, and crop plants only five. For the average crop to become as “weedy” as the average weed, it would need to acquire five weedy traits. Even using the unlikely assumption that those traits are single loci in which a dominant mutation would provide the weedy character, this would require the simultaneous acquisition of five gene substitutions. …
Soil Disturbance-Residue Management Effect On Winter Wheat Growth And Yield, Wallace Wilhelm, H. Bouzerzour, J. F. Power
Soil Disturbance-Residue Management Effect On Winter Wheat Growth And Yield, Wallace Wilhelm, H. Bouzerzour, J. F. Power
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
The need to reduce soil erosion, maximize soil water conservation, and optimize grain production in dryland cropping systems in the Central Great Plains has culminated in development of nontilled fallow systems. These systems have greatly reduced the degree of soil disturbance, and the amount and degree of residue incorporation. The objectives of this study were to evaluate the influence of soil disturbance and residue management on soil temperature, soil water, and winter wheat (Triticum aestivum L.) growth. Two field studies were established in 1981 and 1982 on an Alliance silt loam (Fine-silty, mixed, mesic Aridic Argiustoll) with treatments consisting …
Immune, Growth And Carcass Responses Of Ram Lambs To Active Immunization Against Desulfated Cholecystokinin (Cck-8), W. E. Trout, J. C. Pekas, B. D. Schanbacher
Immune, Growth And Carcass Responses Of Ram Lambs To Active Immunization Against Desulfated Cholecystokinin (Cck-8), W. E. Trout, J. C. Pekas, B. D. Schanbacher
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
This study explored feed intake and carcass responses to active immunization against desulfated cholecystokinin-octapeptide (CCK-8) in ram lambs. Antibody titers 8 wk following primary immunization and booster immunizations given at 4 and 6 wk averaged greater than 1:1,000. Titers increased to greater than 1:10,000 by 16 wk following a final booster immunization at 11 wk. The antibodies developed against desulfated CCK-8 exhibited 29% and 13% cross-reactivities for sulfated CCK-8 and gastrin-17, respectively. Immunization against desulfated CCK-8 had no effect on feed intake, ADG, carcass weight or carcass quality grade. Backfat thickness and carcass yield grade were reduced (P < .05) by immunization. Organ weights at slaughter, including those of the pancreas and small intestines, were not affected by CCK-8 immunization, with the exception of the lungs, which were 16% lighter (P < .01) in immunized lambs. In conclusion, active immunization against desulfated CCK-8 resulted in development of high antibody titers against desulfated and sulfated CCK-8. Immunization against CCK-8 decreased fat content of the carcass but failed to affect feed intake, carcass weight or ADG.
Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand
Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand
Department of Agronomy and Horticulture: Faculty Publications
Farming Systems Research and Extension (FSR/E) has strongly influenced the direction of agricultural development over the past two decades. Involving farmers, change agents and researchers, this participatory approach to technological improvement has evolved as an efficient means to develop individual components and more integrated systems that are uniquely suited to specific biophysical and socioeconomic conditions. Farmers with similar conditions and for whom specific recommendations are appropriate are grouped, in FSR/E, into identifiable Recommendation Domains. The technologies recommended conform with the biophysical and socioeconomic constraints that create environments within the domains, based on the philosophy that new technologies must conform with …
Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi
Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi
Department of Agronomy and Horticulture: Faculty Publications
A new and distinct variety of rose plant of the hybrid tea rose class, which was originated as a sport of the rose Gabriella; characterized by its bright orange red, well-formed hybrid tea type blooms with dark velvet overtones on the outer edges of the open flower; disease resistant with everblooming habit and outstanding pot forcing characteristics.