Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 49 for “"stocker"”.
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Alternative management strategies for growing and stocker cattle
… for limit-fed growing beef cattle and yearling stocker cattle. Previous research reported improvements in feed efficiency when growing cattle were limit-fed a high-energy diet based on corn and corn co-products compared with a traditional high-roughage diet fed for ad libitum intake; however, …
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Time-lapse seismic AVAz in the Stocker Field
… of the weights. Using 4D seismic data from the Stocker field, we compute the variation of the AVAz response before and after the hydraulic fracturing treatment and production from the area of interest. The results clearly demonstrate how the seismic response changes after these processes are …
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Profitability and adoption of limit feeding during the stocker phase
… the profitability and adoption of limit feeding stocker cattle to better assist producers with management decisions. One analysis looks at comparing the profitability of limit feeding or ad libitum feeding stocker cattle, and the other looks at factors that influence producer adoption of limit …
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Exploring producer perceptions for cattle price and animal performance in the stocker industry
Stocker cattle economic research is very limited in scope. A focus of this research is to deepen our understanding of how cattle price and animal performance variability is viewed and approached by stocker cattle producers in the United States. Another part of this research focuses on what …
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Effects of Respiratory Vaccination Timing and Hormonal Growth Implant on Health, Performance, and Immunity of Newly Received Stocker Calves
… response in high&ndashrisk, newly received stocker calves during a 42&ndashd receiving period. Crossbred bull and steer calves (n = 385) were weighed (initial BW = 202 ± 4.1 kg), stratified by castrate status on arrival, and assigned randomly to 1 of 4 treatments arranged in a 2 × 2 …
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The Virginia Beef Cattle Simulation Model: A bio-economic simulation program modeling the interactions among reproduction, forage availability, nutrition, growth, and marketing in beef cattle
… as whether to retain weaned calves through the stocker growth stage. Its five source-code modules are reproduction, forage, nutrition, marketing, and a tool that randomly assigns values to variables from appropriate statistical distributions. The VBCSM contains production statistics for 12 …
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The Ethics of Care of the Self as Resistance to a “Peculiar Institution”
… ethics) posed by Elizabeth Anscombe, Michael Stocker, Bernard Williams, and Susan Wolf. It focuses on Stocker’s challenge that when subjects try to act on such theories they become self-effacing in that they create a divide between one’s reasons and one’s motives. This study argues that in …
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Comparison of techniques for estimating pasture herbage mass and productive ground cover for Lakota prairie grass, Kentucky 31 endophyte free tall fescue, Kentucky 31 endophyte infected tall fescue and Quantum 542 tall fescue grazed by stocker steers
… (non toxic endophyte infected) under grazing by stocker steers. Forage botanical composition and yield were determined by clipping three 0.25-m2 areas per treatment replicate. Prior to harvesting, the canopy height within each quadrate was measured with a disc meter. In 2005, productive ground …
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Simulation dynamique des échanges thermiques à l'intérieur d'une serre
… une méthode simple mais moins connue, consiste à stocker le surplus de chaleur directement dans le sol en faisant circuler l’air chaud à travers des tuyaux qui y sont enfouis. C’est dans le but de mieux développer cette technique au Québec que le projet ÉCHAS (ÉCHangeur-AccumuIateur de chaleur …
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Proposition d’une plateforme de gestion des données de recherche et son adoption par les chercheurs en environnement et informatique dans le contexte de la recherche en foresterie au Québec
… plateforme avec quatre outils : NextCloud pour stocker et partager les données, JupyterHub avec Python et R pour l'analyse des données, un gabarit pour le plan de gestion des données et un site Web pour accéder à tous les outils et rassembler les informations sur les projets. Nous avons appliqué …
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Mitigation of Bovine Respiratory Disease Complex: Interactions of Physiology, Immunology, Nutrition and Management
… and immunological measurements in newly received stocker cattle. Two experiments evaluated timing (d 0 vs. 14) of respiratory, clostridial, or both vaccinations in newly received stocker calves during stress-induced immunosuppression. In Exp. 1, calves receiving 14-d delayed vaccination of a …
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Prevalence of bovine viral diarrhea virus subspecies among persistently infected positive samples submitted to a diagnostic laboratory from cattle in the United States
… from various segments of the industry: cow/calf, stocker, feedlot, and dairy. Samples used were from live animals where fresh skin (ear notch) had previously tested positive for persistent infection via antigen capture ELISA (ACE) or immunohistochemistry (IHC). This study was comprised of 1,093 …
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Forage Utilization and Nitrogen Management of Tall Fescue Stockpiled for Winter Grazing
… States offers a beneficial environment for stocker and cow-calf production. Abundant tall fescue grass offers a feed source that has been underutilized. These studies evaluated how nitrogen rate and source can affect yield and nutritional quality of fall stockpiled tall fescue, and how …
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Utilization by ruminants of poor quality hay supplemented with different nitrogen and carbohydrate sources
… compared under practical conditions when fed to stocker cattle receiving a hay diet. Sixty cattle were wintered on fescue hay with one of five supplements: 1) none, 2) liquid urea-molasses supplement injected into the bales, 3) liquid-supplement self-fed in lick-tank, 4) mixture of deep-stacked …
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Films minces mésoporeux d'oxydes de métaux de transition et de lithium : Influence du cation alcalin et de l'agent structurant sur la synthèse par soft templating
… centaines de nanomètres d'épaisseur. Afin de stocker un maximum d'énergie dans le volume réduit d'un accumulateur au lithium miniature, une architecture mésoporeuse (dont le diamètre des pores est compris entre 2 et 50 nm), permettant d’augmenter la surface spécifique du matériau, a été …
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Linear programming applied to a forage based cattle and sheep production system on a demonstration farm
… a spring calving cow herd or the purchase of stocker calves for summer grazing ensured the optimal farm plan as forage was better utilized by the fall herd. Seventy three fall calving cows and 152 winter lambing ewes were in the optimal plan. The ratio of fall calving cows to winter lambing …
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The fiscal impacts of use-value taxation in Prince William County, Virginia
… open space along the rura1-urban fringe (Stocker 1975; Ferguson), and further that such programs may actually lower the community's property tax base significantly (Tiebout; Anderson 1993). Additionally, when land is taxed by its use-value rather than market-value, the local tax base …
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The economic potential of establishing a poultry litter handling industry
… estimate the value of litter as a feed for beef stockers and beef cows. The value of litter in beef and stocker rations were estimated by determining the value of alternative feeds replaced by litter. The value of litter for use as fertilizer was estimated by determining the value of commercial …
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Developing a new nano-enhanced phase change material (NEPCM) for medium grade thermal energy storage
… cette question se pose: comment pouvons-nous stocker plus d'énergie dans un espace plus petit avec moins d'équipements de support? Comment pouvons-nous coupler des systèmes énergétiques économes avec des ressources énergétiques conventionnelles et renouvelable, en particulier dans les zones …
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Untersuchungen zum Pathomechanismus des T-Helferzellverlusts bei der HIV-Infektion
Der Pathomechanismus des T-Helferzellverlusts bei der HIV-Infektion ist bisher ungeklärt. Diese Arbeit zeigt, dass primäre, HIV-uninfizierte CD4+ Zellen in Kontakt mit HIV-infizierten Zellen zugrundegehen. Zur Aufklärung des Mechanismus dieses Zelltodes wurden einzelne Schritte der Zellfusion …
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