J. Anim Sci.
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J. Anim Sci. 1982. 55:224-231.
© 1982 American Society of Animal Science
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A Survey Evaluation of South Dakota Beef Cattle Production1

Vernon Dooley2, C. A. Dinkel, C. A. McPeake3 and E. L. Lasley4

South Dakota State University,5, Brookings 57007

Abstract

Production data from 81,012 cow years and 497 ranch years were compiled in a series of producer-completed surveys. Mean calving rate of cows exposed for breeding was 87.2%. Calving rate differed (P<.05) with herd type and cow condition. Mean weaning rate was 78.1%. The difference between calving and weaning rates (9.1%) reflected preweaning death loss. Herd type and cow condition influenced (P<.01) weaning rates. Herds with later mean calving dates tended to have lower (P<.05) weaning rates. Cooperating herds had a mean weaning weight of 212.8 kg, and herd type (P<.01), region of state (P<.05) and creep feeding (P<.05) were important sources of variation. Mean net weaning weight (kg of calf weaned/cow exposed) was 166.2 kg. Herd type and sex of calf affected (P<.05) net weights. Crossbred commercial herds had a mean weight 14.6 kg higher than that of straightbred commercial herds and 14.1 kg heavier than that of seedstock herds. Producers reporting only bull calf weaning weights obtained a mean net weaning weight 8.9 kg higher than that obtained by producers reporting only steer weights and 59.7 kg higher than that obtained by those reporting only heifer weaning weights.

Footnotes

1 Published with the approval of the Director of the South Dakota Agr. Exp. Sta. as Pub. No. 1761 of the Journal Ser.

2 Present address: Dept. of Anim. Sci., Michigan State Univ., East Lansing 48824.

3 Present address: Dept. of Anim. Sci., Oklahoma State Univ., Stillwater 74074.

4 Present address: Farmers Hybrid Companies, Inc., Des Moines, IA 50318.

5 Dept. of Anim. Sci.






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Copyright © 1982 by the American Society of Animal Science.