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Preliminary Report on Tests of the Accuracy of Milk Scales

Agricultural Engineering Research Division

J. H. Book

Dairy Cattle Research Branch, Animal Husbandry Research Division, United States Department of Agriculture, Beltsville, Maryland

ABSTRACT

Measuring the milk production of individual cows by weighing the milk at the completion of milking has been practiced for many years. Production records are desirable for individual herd management and for herd improvement association records. Recently, during discussions on milk-flow meters, the question of accuracy was raised. Tt was evident that standards must be set up to provide a basis for approving meters or other weighing devices, for subsequent use in production-record programs. Tt was generally agreed that such standards be equal to, or preferably better than, existing standards.

It then became necessary to determine, as accurately as possible, the prevailing standard of accuracy of milk scales. It was obvious that a true determination of accuracy standards would have to be based on checks of scales throughout the major milksheds of the nation. Such a task would be formidable and virtually impossible to accomplish. It was then decided to check a few scales in a preliminary study, to obtain an indication of scale accuracy.