Assuming what you say is true, what does it mean? It means that capitalism is unsustainable. Farmers armed with industrial agriculture will compete themselves into poverty and destroy the environment in the process.

most of the time (read:always) the "do not grow" subsidies are paid out after the product has already been grown, and often after its already been harvested. they just get paid above market value to not bring it to market. so it has literally zero to do with preventing a dustbowl

theoretically it could be used that way, but it isnt the actual purpose