I think that's code for "migrant farm worker"
Uh, no. Custom cutters run the entire length of the midwest fllowing the ripening crops. Since small farmers can't afford to each own a large fleet of Combines and trucks etc to harvest their entire crop in the narrow window, the Custom Cutters come through and harvest for a percentage, and everyone is happy. There may be a couple of the truck drivers or what-have-you that are illegals, but it is NOT like the tomato pickers or lettuce pickers in california.