Here in Missouri, it's illegal to bait during hunting season. In fact, you must remove any bait 10 days prior to deer season starting.

Some guys use corn to get deer in front of a trail cam prior to the season opening, to get a gauge on what might be around.

Personally I don't care for the idea of killing an animal over bait, I don't even relish the idea of hunting over an ag field, tho I'll do it late in the season if I have a less than full freezer.