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Dairy Research Projects
Improving Dairy Cattle Genetically
- Cooperators: L.B. Hansen, G.D. Marx and H. Chester-Jones
- Controlled selection experiements for high versus control milk yield (Southern Experiment Station, Waseca) and larger versus small body size (Northwest Research and Outreach Center, Crookston). Genetic lines are maintained to monitor direct and correlated responses to selection. Cattle are often used for other studies, and interdisciplinary research with genetic lines should answer important questions regarding the biology of the dairy cow.
Feed Intake and Milk Production of Holsteins Selected for Large and Small Body Size
- G.D. Marx and L.B. Hansen
- Feed intake of two genetic groups, one for large body size and one for small bosy size, is evaluated to delineate nutritional differences of groups. Efficiency and profitability of production is examined for the two genetic groups.
Effect of Daily Administration of Recombinant Bovine Somatotropin (Upjohn rBST) on Consecutive Lactation in Dairy Cows
- B.A. Crooker, G.D. Marx, J.W. Lauderdale, E.P. Stanisiewski, J.F. McAllister (Grant from Upjohn Company, Agricultural Division)
- Measure production and health responses of cows to daily injections of recombinant bovine somatotropin at the Northwest Research and Outreach Center, Crookston. Three other locations are also involved in this research study.
Managing a Herd of Registered Holstein Cattle Including Time and Cost Studies of Dairy Management Practices
- G.D. Marx and L.B. Hansen
- Utilization of applied practices and modern technology in breeding management, reproductive management, feeding management, milking management, and waste handling managment in managing an efficient dairy enterprise, and to determine actual individual animal changes for breeding, digestive, locomotion, respitory, effects of production levels and cow size. (See Below for Specific Projects)
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