Economic returns were similar for soybeans, urea, and soybean meal. Therefore soybeans must also be price competitive with supplements containing urea to be economically feasible. I have not come across any trials feeding blends of urea and raw soybeans to cattle and perhaps for good reason. Raw soybeans and urea are both highly degradable in the rumen so there may be no particular nutritional advantage. Soybeans would probably need to be ground to maintain a mixture of urea with soybeans.
Raw soybeans contain the enzyme urease, which breaks down urea to ammonia.
Heating soybeans is required to destroy the urease enzyme if they are to be used as a protein source for pigs. However, they noted a numerical trend towards increasing the quality grade with increasing levels of whole raw soybeans. Cosby et al. Trenkle et al. Unsaturated fats are preferred to saturated fat in human diets.