In theory a great idea. In reality you get very little space to farm on. Imagine how you drive though the solar panels with an harvester which is as big as 6 rows are wide?

I mean you can shrink down the farming equipment, but farmers make more money not plastering their fields with solar.

If they use solar then they go full south orientation panels because then you don't need to deal with anything on that field anymore.

Also after you install solar panels on a field with heavy equipment the soil is pressed and you will have a few years until you get the soil quality back up.