The most pro-nature approach I can think of is to use farmland for fuel production (a hectare of corn produces 20 MWh/ha/y in bioethanol), convert 3% of it to PV (700 MWh/ha/y) and restore 97% of it to its natural state while still harvesting the same amount of energy. In the US that could be 40 million acres restored to nature. You can improve farming methods for actual food production, but none of that will beat millions of acres of land not being used for farming at all. Another, much more effective measure would be to reduce meat consumption to, again, render millions of acres of farmland ready for renaturalization.