Have you scouted it and seen birds on it? Just answer that question to yourself. If you have and have seen no birds, or any landing/flying over close to the field it's a waste. 2 inches of crusty snow is bad too. I had a private corn field that was loaded with ducks prior to the snow, once it snowed and froze they haven't been back. Moved on to a field down the road with cattle in it, eating cow crap that has corn in it.