Abstract
HAYWARD, Steenbock, and Bohstedt (1936) reported that rats required additional cystine in their ration when its protein was supplied by unheated soybean oil meal.Heat treatment of the meal under specified conditions eliminated this deficiency.Hayward, Halpin, Holmes, Bohstedt, and Hart (1937) reported that heated or unheated soybean oil meal was unsatisfactory as the sole protein supplement in poultry rations. The substitution of 2 percent each of dried skimmilk and meat scraps for their protein equivalents of soybean oil meal markedly improved the value of the ration.These two papers included reviews of the previous literature. Very little other work has been published concerning materials which improve the value of soybean oil meal in chick rations.EXPERIMENTALThe following experiments were devised in an attempt to determine the types of commercial products which would be useful as supplements to a soybean oil meal-grain ration.In the experiments to be described, .
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