Alva Agee, Crops and Methods for Soil Improvement
“ In cool latitudes the soybean is recognized as distinctly more profitable, making larger yields of vines and of seed. Where adaptation is equal, the cowpea makes a slightly larger growth of vines for hay, but the soybean gives a much richer lot of seed for use as grain. When soil fertility is the chief consideration, the adaptation of climate and soil should decide our choice between these two legumes. There is no serious difference where conditions for each are equally good. In cool latitudes the soybean should be chosen. In the Ohio Valley it is usually to be preferred. ”
