Solar farms and windfarms are more important than sustaining agriculture at the moment.
These solar farms are there to save the countryside from turning into a wasteland caused by C02.
If it weren't for cheap oil and human greed the world woud have been full of solar farms and probably a better place.
A good place to start reading about solar vs oil would be this...
https://en.m.wikipedia.org/wiki/Augustin_Mouchot
Yes agriculture would suffer but that is a small price to pay for making steps to literally save the planet.