“…Recent work by Berry et al (1943) and Marvel et al (1945aMarvel et al ( ), (1945bMarvel et al ( ), (1945c indicates that soybean oil meal is adequate in protein quality, but deficient in some of the vitamins supplied by animal products. Bird and Groschke (1942) reported that the efficiency of feed utilization was greater when combinations of soybean oil meal, corn gluten meal, and some animal protein were fed, than when corn gluten meal was omitted.…”