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Journal of Dairy Science Vol. 64 No. 6 1269-1277
© 1981 by American Dairy Science Association ®
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Dairy Herd Improvement Associations

D. E. Voelker

Department of Animal Science, Iowa State University, Ames 50011

ABSTRACT

A 75-yr history of the development of Dairy Herd Improvement Associations in the United States includes early cow testing efforts, involvement of the American Dairy Science Association, and activities of Cooperative Extension Service and United States Department of Agriculture personnel. Changes in organizational structure, improvement in methods and equipment, and expanding uses of data are documented. Enrollment and production improvement data are summarized.




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E. Hare, H. D. Norman, and J. R. Wright
Duration of Herd Participation in Dairy Herd Improvement Milk Recording in the United States
J Dairy Sci, August 1, 2004; 87(8): 2743 - 2747.
[Abstract] [Full Text] [PDF]


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Copyright © 1981 by the American Dairy Science Association ®.