Unfortunately, I'm relatively sure that field corn isn't harvested the same way as sweet corn, and so there might not be a way to collect those cobs before they dry.
Sweet corn is (usually) picked by hand on a much smaller scale, left in its natural leafy husk, and transported for retail sale within a week or two.
It's a whole different ball game. I'm sure we COULD take big portions of our feed/fuel field corn and grind it into human-ready cornmeal for mush and cornbread, but it wouldn't be a walk in the park :-/