Am. Soc. Anim. Prod.
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Am. Soc. Anim. Prod. 1939:245-250
© 1939 American Society of Animal Science
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Some Factors Affecting the Efficiency of Artificial Insemination of Dairy Cows *

H. A. Herman

University of Missouri

Abstract

The use of artificial insemination in some 50 Missouri dairy herds and involving over 1,000 cows has caused the breeding efficiency of these herds to be closely scrutinized. A wide variation in the number of services required per conception where an individual bull is used in a number of different herds has been commonly observed. The majority of these dairy herds are a part of a cooperative breeding project involving a Farm Security project at Hughesville, Missouri, cooperating with the Missouri College of Agriculture; and the remainder are large institution herds of 50 to 200 cows. All are relatively free of Bang's disease, but some vaginitis is prevalent.

Footnotes

* Contributed by the Dept. of Dairy Husbandry, Missouri College of Agriculture. Journal Series No. 648.






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Copyright © 1939 by the American Society of Animal Science.