Koolau
Give me a museum and I'll fill it. (Picasso) Give me a forum ...
Probably a question for ivinsfan, but around here the crop fields are rotated between corn and soybeans. My limited understanding is that beans help put nitrogen into the soil, and corn depletes it. Hence the rotation of the fields. Would this help offset fertilizer needs? Or is fertilizer still required for other elements?
Also most likely a weather based issue: it seems around here and also Indiana that corn or soybean are all you see growing.
Heh, heh, as a city boy from farm country, I can answer that. Corn always needs fertilizer. Yes, the beans do help with nitrogen, but corn farmers also add ammonia and other fertilizers to their corn.
Across the central midwest wheat and even oats are grown but the big crops are corn and beans.
ivinsfan can give us the details, I'm sure as YMMV.