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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 20 of 231 for “"heifers"”.
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Feeding dairy heifers
no abstract provided by author
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Factors affecting estrogen excretion in dairy heifers
… factors affecting estrogen excretion in dairy heifers. The objective of the first study was to quantify estrogenic activity in feces and urine during the estrous cycle. Ten non-pregnant Holstein heifers were fed the same diet for 28 d. Plasma, feces, and urine samples were collected daily. …
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Dry matter intake prediction of Holstein heifers
Data sets from six locations containing 631 dairy heifers and 5409 observations of individual dry matter intake (DMI) were used to develop an equation to predict DMI. Data were contributed by Pennsylvania State University, University of New Hampshire, Purina Mills, Kansas State University, …
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Protein level for heifers on winter bluestem pasture
LD2668 .T4 1966 D44
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Utilizing grass in fattening yearling heifers for market
LD2668 .T4 1940 W52
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Utilizing grass in fattening yearling heifers for market
LD2668 .T4 1940 W52
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Improving Nutrient Utilization and Growth in Dairy Heifers
… enterprise, one major cost is raising young heifers. Optimizing feeding programs of dairy heifers is imperative for the sustainability and profitability of dairy operations. Studies have shown that preweaned calves fed milk replacers (MR) with crude protein (CP) concentrations greater than …
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Growth, body composition and costs of feeding Holstein heifers
Growth and body composition of 121 Holstein heifers (4.6 to 18 mo and 129 to 407 kg) reared on pasture, drylot and pasture-drylot systems were evaluated in 6 experiments. Heifers were switched from drylot to pasture or the reverse to study carry-over effects from previous treatments; both systems …
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Calf shape and pelvic dimensions affecting dystocia in beef heifers
Typescript (photocopy).
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The energy requirements for the normal growth of dairy heifers
Text from introduction: "There are at least two reasons why more definite knowledge of the energy requirements of growing cattle are desirable. First, the energy requirement of the animal is known to be high and because of the increased cost of feeds with high energy value there is a greater …
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The Vaginal Microbiome Related to Reproductive Traits in Beef Heifers
… considered to be pathogenic in humans. In beef heifers, little is known about the vaginal and fecal microbiota with respect to their relationship with fertility. To this end, we followed heifers through gestation to examine the dynamics of vaginal and fecal microbial composition throughout …
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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 Effects of Tamoxifen on Mammary Development in Prepubertal Heifers
… on mammary gland development in prepubertal heifers given the anti-estrogen tamoxifen. Sixteen Holstein calves were randomly assigned to one of two treatment groups: tamoxifen-injected (TAM) or control (CON). Calves were subcutaneously injected daily from 28 to 120 days of age with 0.3 mg/kg …
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The response of growing dairy heifers to frequency of feeding
At least five million heifers are raised annually in the United States to maintain the dairy cattle population and provide for our future needs. These animals are in reality the very foundation of the dairy business and the prosperity of everyone connected with it are dependent, at least to a …
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Prediction of Fertility of Virginia Beef Heifers Using Expert Systems Technology
An expert system to predict the fertility of beef heifers was developed using the A.I. Toolkit KAPPA-PC 2.33. The knowledge base was developed from scientific literature and from a beef cattle reproduction expert. The expert system computes an evaluation age, age both at the start and end of the …
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Verification of equations to predict dry matter intake of dairy heifers
Diets of varying forage base were fed to dairy heifers to test the accuracy of an prediction equation to accurately predict dry matter intake (DMI). Heifers ranging from 120 to 430 kg body weight, were randomly assigned to treatments with forage bases of 1) 100% corn silage, 2) 75% corn silage : …
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Development of equations to predict dry matter intake of dairy heifers
… animals were developed with 118 Holstein heifers fed totally mixed rations (TMR). Animals grouped according to body weight (136, 227, 317 kg) were fed TMR (corn silage, ground hay, high moisture corn, soybean meal) once daily for 28 days. Rations were balanced to mean body weight according …
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Nutrient composition and sensory attributes of beef from grain-finished steers and heifers
Over the past decade, nutrient composition of beef became an increasingly important topic both domestically and internationally for the beef industry and its consumers. Beef is an important source of protein, monounsaturated fatty acids, conjugated linoleic acid, vitamins and minerals. Due to …
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