RE: Late Season Food Sources
Here alfalfa/winter wheat/fall rye are the preferred food source to hunt in late season. However this year with no snow and a early frost the deer have lots of crop in fields to eat. I am currently hunting an area that has standing oats close by and it is getting hammered, the deer are actually bypassing the alfalfa field to eat the oats.
In previous years you would still see some eating on stubble (barley, wheat, oats, peas and even the odd canola field) but larger numbers where on the greens or hay. I don't have corn or bean fields to hunt so can't say what happens post harvest with these food sources, but if diminished I would look for hay, grasses or green crops.