J. Anim Sci.
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J. Anim Sci. 1952. 11:3-16.
© 1952 American Society of Animal Science
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Some Features of Growth and Development of Hereford Cattle1

H. R. Guilbert and P. W. Gregory2

University of California,3

Abstract

Normal growth curves based on data collected over a period of twenty-five years from the University of California purebred Hereford herd are presented.

Body measurement data on males and females are summarized and discussed in relation to differential growth and development. Measurements and indices derived therefrom are considered in relation to subjection evaluation by grading. Some general problems in beef type selection are discussed.

Footnotes

1 This investigation became cooperative with the U.S.D.A., Bureau of Animal Industry and State Experiment Stations under Western Regional Project W-1 in 1948.

2 The authors wish to acknowledge the assistance, over many years of the "Dean of Herdsmen", Alex McDonald in collection of the data. His native wisdom and Scot's instinct did not permit him to be optimistic that anything of great value in the improvement of beef cattle could be derived therefrom. Nevertheless, his ready cooperation and sound counsel have been extremely valuable. He even got so that he did not mind his fellow herdsmen catching him helping with such "monkey business"! Grateful acknowledgment is also made to W. C. Rollins for directing the statistical analyses and to Mrs. Patricia Chevalier, Cooperative Agent, Bureau of Animal Industry, U.S.D.A. who assembled much of the later data and carried out the statistical calculations.

3 Division of Animal Husbandry, Davis, Calif.






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Copyright © 1952 by the American Society of Animal Science.