Regulations vary by state. In the two state plant fields and I hunt, I can not harvest a single grain and bring it back into the field later and spread it. I can decide to bush hog wheat if I am just not going to harvest it. Doing this is legal, where if I harvest the wheat and spread it back into the field later I am guilty of baiting.
Where it can get tricky is normal farming operations. I have seen wheat broadcast on the surface which I consider to be baiting. Wheat I plant is drilled into the land not broadcast on the surface like nuts on a ice cream. But years ago I know a few farmer did broadcast wheat, rye or clover seed on the surface of new disked ground in small areas. That was legitimate farming practice then but I would not try it now.
Best field I ever saw for dove was ten acre of lightly disked cantaloupes. There were several thousand dove there opening day. Everyone was done in a few minutes. Dove were like flies on the ground. You could not look in any direction and not see several dozen to maybe fifty birds entering or leaving the field all day long.