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Journal of Dairy Science Vol. 43 No. 7 966-974
© 1960 by American Dairy Science Association ®
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Judging the Effectiveness of Age-Correction Factors1

S. R. Searle2 and C. R. Henderson

Department of Animal Husbandry, Cornell University, Ithaca, New York

ABSTRACT

Several criteria for comparing the effectiveness of age-correction factors are discussed. Their usage in comparing multiplicative, herd-level, and additive correction factors is considered in detail, based on analyzing 5,577 Holstein records which had been age-corrected by the three sets of factors. No analysis showed any difference between the herd-level and multiplicative factors.

FOOTNOTES

1 Some of the results in this paper are taken from a thesis submitted by the senior author in partial fulfillment of the requirements of the Ph.D. degree.

2 Present address: New Zealand Dairy Board, Wellington, New Zealand.






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