The proteins, as one of the primary groups of nutrients, have commanded the attention of research workers for many years.

Experiments have demonstrated that various proteins differ greatly in nutritive value. Since a large part of the animal diet is generally compounded from protein feeds, which are usually high priced, it is important that this nutrient group be utilized as efficiently as possible.

Corn oil meal is a corn milling by-product consisting of the corn germ after the oil has been extracted. It contains from 20 to 25 percent protein.

Eleven large companies are now operating in the United States processing from 60,000,000 to 125,000,000 bushels of shelled corn each year. This means that from 65,000 to 130,000 tons of corn oil meal are available annually for livestock feeding.