The latest generations of corn hybrids are engineered with genetic traits that the FDA won't allow to go directly into the human food chain because they don't or won't test them. These corns are only good for non-food oil and fuels and such, and sometimes feeds. These corns can grow nearly 300 bushels to an acre of IA or SD farm land.
The best of the food chain, corn syrup-types, grow just over 200 bushels to an acre.
The best of the sweet corn, the stuff you actually eat as corn, is hard pressed to get 70 bushels to an acre.
Without sweet corn selling for over 4 times what fuel corn goes for, there's no good reason to grow food if you're going to grow corn. It's just not worth it. When a farmer is trying to decide what to plant in the spring he has to hedge his bets for what's going to earn him the most when the crop comes in, and while there is some science to it it's always a leap of faith.
By far the best solution to a food corn shortage is one of the easiest for all of us to make: A CO-OP. If you find a local farmer who has a good head on his shoulders and a group of similarly minded locals, it's pretty easy to convince most farmers to plant a pass or two of sweet corn if someone else pays for the seed and can get it harvested and sold. (Modern harvesting equipment doesn't work well on sweet corn, it would have to be done by hand.) He might lose an acre, or $1500-2000 gross worth, of field corn profits, but that acre of sweet corn would be enough for 50 families, and it woud cost them each $30 and one afternoon mid-summer for all the corn they could put up and eat for a year. Offer to pay the farmer up front, and he'd probably even go cheaper, a sure thing now is always better than a maybe later.
