Soybeans that are harvested by farmers and dumped in their silos will mold and rot in pretty short order. I used to do work for Cargil, ADM, and other companies that bought soybeans from the farmers in the Midwest and stored them in huge grain elevators, for later shipment on barges down the rivers to New Orleans. The beans were then were loaded on ocean going vessels for sales to the world markets.
Bottom line, was that all of the large grain elevators had "grain dryers", that had to be operated to dry the soybeans to a certain percentage of moisture before they could be stored. All of the grain sale contracts had warranties about this moisture percentage, and prior to acceptance by the buyers, they all had "trickle" scales that they used to measure the exact moisture and the exact percentage of "foreign matter." If the beans failed the test, then no sale.
Oh, and there was a complicated bacteria test as well.
So, if you think you can just roll on up to a farmers house and get soybean from his silo to eat, I wouldn't count on it being fit for human consumption.
And, rotten soybeans smell like rotten meat!
Mannyrock