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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"Bred heifers"”.
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An Analysis of Body Condition Scores, Ultrasonographic Fat Thickness, and the Interaction Between the Two on Conception Rates in Yearling Cross-Bred Heifers
One hundred Branvieh cross heifers ranging from 13-17 months of age were used in an analysis of conception rates through three estrous cycles. Cattle were estrus synchronized and artificially inseminated through two estrous cycles then pasture exposed to reproductively sound Branvieh bulls. Body …
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Financially Optimal Culling Strategies for Western Canadian Cow-Calf Producers
… heifer calves (Scenario 1 and 3) or purchased bred heifers (Scenario 2). Using these culling and replacement scenarios a net present value (NPV) model is converted to an equivalent annual annuity (EAA). The enterprise profitability analysis assesses the cash flow and returns on assets (ROA) for …
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An electronic model for determining value and predicting sale price of Holstein cattle sold at public auction
… of Holstein dairy cattle using examples of 2648 heifers and cows professionally appraised prior to sale at public auction in 1987-1988. Data recorded in the sale catalog, additional information announced at the sale and type conformation scores were transformed into 137 concepts that described …
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Phenotypic and microbial influences on dairy heifer fertility and calf gut microbial development
… to reproductive physiology in virgin Holstein heifers based on outcome of first insemination, 2) to characterize the uterine microbiome of virgin Holstein heifers before insemination and examine associations between uterine microbial composition and fertility related phenotypes, insemination …
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A hedonic model on bred heifer prices: auction, heifer, genetic, and reputation effects considered
… marginal implicit values of characteristics of bred heifer sales to determine qualities and characteristics buyers demand. The sales data encompasses 10 years of transactions for Show-Me-Select bred heifer sales. Emphasis is on estimating implicit values of production and phenotypic factors, …
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Manure and Nutrient Accretion, Partitioning, and Excretion in Holstein Heifers
… to carry environmental permits. While growth of heifers is a widely researched topic, publications concerning nutrient utilization, partitioning, and excretion are scarce and are becoming necessary. That combined with the fact that feeding programs for heifers are highly variable from region to …
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The Influence of Artificial Insemination in Three Midwestern States
… the same treatment as calves, yearlings and bred heifers. The production differences of these groups would be as free from environmental influences as it is possible to make them. This study was initiated to evaluate the advantages offered through artificial insemination, in Holstein-Friesian …
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The use of carcass traits as indicators of heifer pregnancy in Angus cattle
… is heifer pregnancy, or the ability of heifers to conceive within the first breeding season. Heifers that fail to become pregnant in the first breeding season are often seen as an economic loss and culled from the herd. While these females may be fed out and marketed as feedlot cattle, …