On the roofs I think I would agree with. Over the fields, you're losing agricultural output, so you would want to be careful with that.
Again, say for Southbrook, it was a seven-year payback for the panels, but it was a four-month payback to not use energy. You can cut a ribbon around a solar panel, but you can't see not using energy, so it doesn't have the same cachet or whatever.
That's where the biggest benefit for the farmer is, to reduce that demand. Then, all the electricity you're buying is turning into heat eventually. Are you paying to get rid of that heat from your cooling tower, or can you reuse that heat with a whole-systems approach? Don't improve one part of it; look at the whole system and improve that, and then look at renewables for what's left over. Don't start with renewables.