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Bulls vs… steers conventional and Russian castrates amd effects of stilbestrol

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Authors

W. J. Clawson, University of California, Davis
Reuben Albaugh, University of California, Davis
Don Petersen, Merced County

Publication Information

California Agriculture 24(2):12-14.

Published February 01, 1970

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Abstract

Two significant findings of this experiment were: (1) Russian castrates were intermediate between steers and bulls in all phases of production (preweaning and postweaning), although these differences were not significant; (2) nursing steer calves implanted with 30 mg stilbestrol, and again as they entered the feedlot for finishing, performed just as well as those that were implanted first upon entering the feedlot—however, the double-implant animals produced carcasses that were 33 lbs heavier (cold weight) than those that were implanted only once (indicating that the cow-calf operator, as well as the cattle feeder, can secure benefits from stilbestrol implantation). Bulls again outperformed steers and Russian castrates (substantiating recent reports by other researchers) in daily gain, carcass index, and cutability as well as feed efficiency.

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Author notes

Feedlot finishing at U.C. Davis was under the direction of William Garrett, Professor of Animal Science. Castrations were performed by Drs. John Kendrick, Professor of Veterinary Medicine, and George Crenshaw, Extension Veterinarian, U.C., Davis. Final USDA slaughter grades were determined by C. A. Santare, Supervisor, USDA Livestock Meat Grading Branch, San Francisco.

Bulls vs… steers conventional and Russian castrates amd effects of stilbestrol

W. J. Clawson, Reuben Albaugh, Don Petersen
Webmaster Email: wsuckow@ucanr.edu

Bulls vs… steers conventional and Russian castrates amd effects of stilbestrol

Share using any of the popular social networks Share by sending an email Print article
Share using any of the popular social networks Share by sending an email Print article

Authors

W. J. Clawson, University of California, Davis
Reuben Albaugh, University of California, Davis
Don Petersen, Merced County

Publication Information

California Agriculture 24(2):12-14.

Published February 01, 1970

PDF  |  Citation  |  Permissions

Author Affiliations show

Abstract

Two significant findings of this experiment were: (1) Russian castrates were intermediate between steers and bulls in all phases of production (preweaning and postweaning), although these differences were not significant; (2) nursing steer calves implanted with 30 mg stilbestrol, and again as they entered the feedlot for finishing, performed just as well as those that were implanted first upon entering the feedlot—however, the double-implant animals produced carcasses that were 33 lbs heavier (cold weight) than those that were implanted only once (indicating that the cow-calf operator, as well as the cattle feeder, can secure benefits from stilbestrol implantation). Bulls again outperformed steers and Russian castrates (substantiating recent reports by other researchers) in daily gain, carcass index, and cutability as well as feed efficiency.

Full text

Full text is available in PDF.

Author notes

Feedlot finishing at U.C. Davis was under the direction of William Garrett, Professor of Animal Science. Castrations were performed by Drs. John Kendrick, Professor of Veterinary Medicine, and George Crenshaw, Extension Veterinarian, U.C., Davis. Final USDA slaughter grades were determined by C. A. Santare, Supervisor, USDA Livestock Meat Grading Branch, San Francisco.


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