Rent seeking is right. Farmers shouldn't be subjected to landlord economics via their equipment. That is, equipment cost shouldn't scale simply to eat farming profit (as rent costs quickly rise to eat rising incomes).

I'd want to see the numbers on exaclty how much supposed always-up farming equipment saves in crop production, compared to farmers that don't use it.

In fact, I know for certain that the most productive farmland in the US, per area unit, is least likely to use motorized equipment of any kind. And when they do it isn't equipment on par with John Deere.