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Dairy Day, 1984
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Browsing Dairy Day, 1984 by Title

Browsing Dairy Day, 1984 by Title

Now showing items 9-13 of 13

Factors affecting estrus and fertility of Holstein heifers after prostaglandin F2α

Stevenson, Jeffrey S.; Schmidt, M.K.; Call, Edward P. (Kansas Agricultural Experiment Station, 2012-10-04)

Stage of the estrous cycle, time of insemination, and season of the year were examined for their influence on estrus and fertility of 223 Holstein heifers after prostaglandin F2α(PGF). Heifers given PGF early in the ...
Gonadotropin-releasing hormone and conception of Holstein cows

Stevenson, Jeffrey S.; Schmidt, M.K.; Call, Edward P. (Kansas Agricultural Experiment Station, 2012-10-04)

To study the effects of gonadotropin-releasing hormone (GnRH) and timing of artificial insemination (Al) on fertility, 328 dairy cows were divided into four groups. Inseminations at first, second, or third service were ...
Immunoglobulin concentrations in serum and nasal secretions of calves at the onset of pneumonia

Corbeil, L.B.; Watt, B.; Corbeil, R.R.; Betzen, T.G.; Brownson, R.K.; Morrill, J.L. (Kansas Agricultural Experiment Station, 2012-10-04)

Immunoglobulin (Ig) concentrations in serurn and in nasal secretions were correlated with pneumonia and diarrhea during the first 12 wk of life of dairy calves. The peak onset of pneumonia occurred between 2 and 4 wk of ...
Prostaglandin F2α for lactating dairy cows with silent estrus

Plunkett, S.S.; Stevenson, Jeffrey S.; Call, Edward P. (Kansas Agricultural Experiment Station, 2012-10-04)

Two experiments were conducted in 17 dairy herds in NE Kansas to determine the effectiveness of prostaglandin F2α (PGF) for reducing intervals to conception for cows with silent or unobserved estrus. Cows that failed to ...
Relationship between production and reproduction in 5,480 Holstein herds enrolled in the Midstates Processing Center.

Call, Edward P.; Stevenson, Jeffrey S. (Kansas Agricultural Experiment Station, 2012-10-04)

Reproductive parameters were evaluated in 5,480 Holstein herds involving 335,673 cows to determine the reported negative genetic effect of production on reproduction. While higher producing herds had a slight decline in ...