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Accuracy of Live Weights of Dairy Cows on Pasture¹

ABSTRACT

Conclusions: The average experimental error of live weights of cattle weighed on three successive days as determined by analyses of variance was 14.0 pounds. The range of 46 groups of weights was from 7.0 pounds to 28.3 pounds. The standard deviation of day to day changes in the weight of the groups of cows averaged 7.7 pounds. The standard error in the weights of 1200-pound cows was on the average only 2.2 pounds.

It is concluded that the method of weighing used in this experiment gave an accurate measure of the live weights of the cows from which the nutrient yield of the pasture was calculated.

¹ Published as Scientific No. 501, College of Agriculture and Agricultural Experiment Station, State College of Washington

² Dairy Husbandman, Bureau of Dairy Industry, U. S. D. A., formerly Agent, Bureau of Dairy Industry, U. S. D. A., Assistant Dairy Husbandman, Washington Agricultural Experiment Station, and Assistant Dairy Husbandman, Western Washington Experiment Station.

³ Dairy Husbandman, Washington Agricultural Experiment Station.