Its a fair question, California agriculture tends to use 11 trillion gallons (34e6 acre feet[1][2]) of water annually. (about 1,700 Googles worth). Generally from a market driven standpoint agricultural users are trying to get maximum $/acre out of their land. I'm trying to convince the state legislature to reclassify "solar farms"[3] as agriculture (as opposed to 'industrial' that they are today) which would allow a farm to decide on an acre by acre basis how much to plant and how much to put into solar farming. Presuming batteries were included in that allowance, 350,000 acres of California farmland as solar farms (panels + batteries for 24/7 power) would power the entire state 24/7 with no need for coal, gas, or nuclear power plants. 100% green energy.
[1] https://en.wikipedia.org/wiki/Water_in_California
[2] https://www.convertunits.com/from/billion+gallons/to/acre+fo...
[3] "Agrivoltaics as a climate-smart and resilient solution for midday depression in photosynthesis in dryland regions" -- https://www.nature.com/articles/s44264-025-00073-1
If farms would choose to do solar instead of crops, I would assume that's because they can get more $/acre, but that could cause food prices to rise. At the same time, energy prices would drop if there was a surplus, so I wonder where it would level out. Lower energy cost could have a small affect in reducing the price of processed foods, but I imagine it would be very small (but I don't really know the energy cost of most processed foods).