Land would not be wild if it wasn't producing crop X. That land is put into productive use because it has been bought and sold to be put into productive use. If its not a field of cattle its a field of soy. If its not a field of soy its a junk yard. If its not a junk yard the owners are desperately trying to get a housing development or an amazon warehouse built, etc. No land owner in this country buys land content to let it sit wild generating no money and incurring costs, unless they are rich as hell and don't want neighbors nearby. If you want more land set aside to be wild, it comes from establishing preserves, not changing how one particular land using industry works. That's just cutting off one snake off the head of medusa, there are dozens left you haven't cut, and rest assured two more will take its place.