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Some Observations on the Secondary Sex Ratio in a Group of Dairy Shorthorn and Welsh Black Cattle

Published online by Cambridge University Press:  27 March 2009

E. J. Roberts
E. J. Roberts
Affiliation:
(University College of North Wales, Bangor.)
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Extract

The heavy wastage occurring in many dairy herds adds importance to the question of sex ratio in cattle, and it becomes an important factor in herds where it is desired to use only home bred cattle, as in herds free from tuberculosis and contagious abortion. The information required for the present investigation was obtained from Private Herd Books, particulars being taken as to sex of calf, month of birth and whether or not it was a first calf. Herds ravaged by contagious abortion were excluded, and also others if it was considered that there might have been neglect in entering births in the private herd book.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 20 , Issue 3 , July 1930 , pp. 361 - 363
Copyright
Copyright © Cambridge University Press 1930

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References

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