I'm embarrassed to admit that I always thought the kind of corn they grow for livestock consumption and ethanol production was called "feed corn." Learned today that it's actually called "field corn." Doh.
My only defense is that the only people I've ever heard say this term out loud haven't exactly been speaking The King's English.
@briankrebs Feed corn is a colloquial term for one of the varieties of field corn (yellow dent).
(I live in Az, but grew up surrounded by WI corn fields.)