This is obviously a way to have corporations take over more farmland.. but I guess they are in the find out stage now.
What Trump has done for US farmers so far:
Farmers who signed contracts w/USDA under IRA programs paid upfront to build fencing, plant new crops, install renewable energy systems w guarantees that feds would issue grants/loan guarantees to cover at least part of their costs. Trump has frozen that money.
Threatening to tariff Canadian potash. Potash is a key component of fertilizer that US farmers need to grow their crops. Most of the potash used in the US comes from Canada.