Different varieties of seed mature and dry down at different rates, guessing the guy is behind or waiting for the corn to get under 12-14% moisture so the elevator doesn't beat him up on dry down fees.
On the bright side he will most likely plant beans there next year and have them out at least a few weeks before hunting season starts...
He will. There's only one field on the farm that doesn't get rotated every year. It doesn't look like he'll be planting any winter wheat this year. Kind of a bummer, I like hunting spring turkey in the stuff.