Soybeans is pretty much one of the best crops for feeding animals because it fixates all the nitrogen it needs, unlike 95% of other grain crops. The only thing

Soybeans is pretty much one of the best crops for feeding animals because it fixates all the nitrogen it needs, unlike 95% of other grain crops. The only thing more efficient to grow fertilizer wise is alfalfa, which is what most cows are fed, but would not be any good for feeding pigs or chickens because it is hard to digest like grass.