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High-Phosphorus vs. Low-Phosphorus Red Clover Hay for Growing Calves

University of Tennessee

Abstract

Recent analyses of alfalfa, sericea, lespedeza, and red clover at the Tennessee Experiment Station have shown extreme variations in phosphorus contents in these legumes. Generally, legumes are considered to be rich in phosphorus and are highly recommended for growing stock and other stock having high phosphorus requirements in their rations. Since many of the legume hays of the state were found to be low in phosphorus, and since no practical way as yet has been discovered to insure high phosphorus contents of these hays, work was begun in the fall of 1939 to compare and study high- and low-phosphorus hays for growing calves.

Chemical analyses of the two hays selected for the first study are shown below:

A spectographic analysis of the ashes of these hays revealed no marked differences with the exception that the low-phosphorus hay was considerably higher in copper than the other hay.

The high-phosphorus hay was grown on the Middle Tennessee Experiment Station farm on soil rich in phosphorus.