Comment by adrr
Be easier just for Arizona to stop growing alfalfa. Its popular because they can grow two crops. According to the feds, there is 300,000 acres of alfalfa in Arizona. Cut that you have enough water saved for tens of millions of people. growing water hungry crops in the desert doesn't make sense.
https://www.nass.usda.gov/Statistics_by_State/Arizona/Public...
The nice thing about the desert Southwest is that the growing season is long and the climate is hot but stable. Water is the issue, but with irrigation, not as much.