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The Relative Feeding Value of Alfalfa Hay and Alfalfa Light Timothy Mixed Hay at Approximately The U. S. No. 1 Grade Level

Dairy Husbandry Research Branch

W. H. Hosterman

Agricultural Marketing Service, USDA, Beltsville, Md.

ABSTRACT

Three lots of hay with an average grade of U. S. No. 1 Alfalfa Hay and three lots with an actual average grade of U. S. No. 2 Alfalfa Light Timothy Mixed Hay (9.6–12.4% timothy) but close to a No. 1 grade were purchased. When the six lots of hay were fed as the sole ration to six groups of dairy heifers for 150 days all groups of animals made satisfactory gains. Differences in the body weight gains of heifers on the two different types of hay were not statistically significant. Results demonstrated that in the quality of alfalfa used, the inclusion of up to 12.4% timothy hay does not reduce feeding value significantly. The advisability of the present 5% limit on timothy allowed in the class Alfalfa Hay (official U. S. standards) is questioned.