Dairy Day, 1991

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Pregnancy rates of holstein cows after postinsemination treatment with progesterone

Stevenson, Jeffrey S.; Mee, M. O. (Kansas Agricultural Experiment Station, 1991)

The objective of this experiment was to determine if pregnancy rates following first services would be improved by supplementing lactating dairy cows with progesterone during two phases after insemination. Cows were ...
Release of parasitic wasps to control stable flies in Kansas dairies

Greene, G. L. (Kansas Agricultural Experiment Station, 1991)

After release of fly parasites in Kansas dairies during 1991, parasitism increased from May to late June then dropped in July. The parasite released was Spalangea nigroaenea of Kansas origin to assure its adaption to ...
Severe flea infestation in dairy calves

Dryden, Michael W.; Broce, A. B. (Kansas Agricultural Experiment Station, 1991)

In June 1991, an investigation was conducted of a severe flea infestation in 23 Holstein dairy calves in South Central Kansas. Inspection of the dairy revealed massive numbers of fleas on calves and in the barn where ...
Leukocyte function and health status of calves supplemented with vitamins A and E

Eicher-Pruiett, S. D.; Morrill, J. L.; Blecha, Frank; Chitko-McKown, C. G.; Anderson, N. V. (Kansas Agricultural Experiment Station, 1991)

Forty-four Holstein calves were fed milk replacers with varied concentrations of vitamins A and E from 3 to 45 d of age to determine their effects on concentrations of plasma vitamin A (retinol and retinyl palmitate) ...
Performance of holstein heifers reared on 100 or 115% of NRC requirements from 3 to 12 months of age and then switched to the opposite treatment

Bortone, E. J.; Daccarett, M. G.; Morrill, J. L.; Stevenson, Jeffrey S.; Feyerherm, A. M. (Kansas Agricultural Experiment Station, 1991)

Holstein heifers from the Kansas State University Dairy Teaching and Research Unit were used from 3 mo of age until 21 d before estimated date of calving. They were fed either 100 (control, C) or 115% (enhanced, E) of ...

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