Make the tractor drive the same distance and do the same work for just half the yield... Now that right there is how to save a planet! Maybe when the ground water nitrate levels get high enough, they might decide to let people pump their own irrigation water agian lol.
Farmers fertilize based on the expectation of a bountiful yield. Then comes an unexpected droubt. Then comes legislation stopping irrigation due to that droubt. No water means the plants don't grow, and subsequently, they don't use the nitrogen that was added to the soil which then seeps deep out of reach of plant roots during the following spring melt. Then, the government bitches because that excess nitrogen got into the groundwater (thanks government, this wasn't an issue before), and now, instead of letting the plants have the polluted water they need, they limit nitrogen use too. With the topsoil now depleted and no-till tax credits being handed out like halloween candy, nothing grows (where are the crop insurance companies?). Then, of course, comes the famine which the government uses to reinforce its purpose and demand more money from the hard working people that wanted to keep the country running in the first place, the people who could have done it cheaper and better.
These people who think they know how to heal the planet need to be the first ones to give up the things they want to take away from us and start a society of their own on an island somewhere apart from the rest of reality.