Yes, they will still go out and eat whats still on the ground. Mainly it depends on pressure in the area. If you have a lot of pressure they will not frequent them in day light very often. If you have little pressure they will come out in the fields all year long.
There will typically be some standing beans left on some of my field edges. I have seen and shot several deer eating on them in the past. I have also watched fox squirrel eating them as well.