J. Anim Sci.
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J. Anim Sci. 1979. 48:1020-1025.
© 1979 American Society of Animal Science
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Reproductive Performance of Two- and Three-Year-Old Bulls Assigned Twenty-Five or Forty Cows during the Breeding Period

W. E. Neville, Jr.1, J. B. Smith2 and W. C. McCormick1

University of Georgia College of Agriculture, Coastal Plain Station, Tifton 31794

Abstract

Two- and 3-year-old beef bulls were exposed to 25 or 40 beef cows on pasture during a 90-day breeding period. Reproductive performance of bulls by age of bull and size of cow group was evaluated in terms of percentage calf crop. Results indicated that reproductive performance of 2-year-old bulls was higher, but not significantly different (P>.05), than that of 3-year-old bulls. The percentage calf crop from 40 vs 25 cows per bull was not different (P>.05). Differences among bulls (within age of bull and size of cow group) for percentage calf crop were significant for each of four intervals during the calving periods.

Footnotes

1 Department of Animal Science.

2 Georgia State Prison, Farm Office, Reidsville 30453.






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Copyright © 1979 by the American Society of Animal Science.