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Relation of Production Records on Cows to Efficient Management of the Dairy Farm¹

Department of Dairy Science, University of Illinois, Urbana

ABSTRACT

Results of studies conducted at the University of Illinois and elsewhere show that, on the average, the annual yield of milk per cow tends to increase progressively with the length of the period during which a program of production testing in a Dairy Herd Improvement Association has been followed. Unpublished data obtained from Illinois D.H.I.A. records show that the cows in 318 herds completing 10 or more yr. of production testing in 1948 yielded an average production per cow per year of 57 lb. of butterfat more in 1948 than they did for the first year tested. Herds in Iowa averaged only 312 lb. of butterfat per cow during the first year of production testing while herds tested from 6 to 10 yr. averaged 360 lb. of butterfat per cow in the last recorded year of production testing (1). Increasing the average production per cow usually means more efficient production and higher returns from the dairy enterprise.

¹ The data in this paper are from a thesis submitted to the Graduate College of the University of Illinois by the senior author in partial fulfillment of the requirements for the degree of Master of Science in Dairy Science, October, 1950.