University of Arizona researchers say vegetable farmers are more concentrated in Yuma County than car manufacturing is around Detroit. According to their new study, Yuma agriculture and associated businesses contributed $4.4 billion in economic activity to Arizona in 2022. Professor George Frisvold said perfect climate, water and labor availability make Yuma unique. … Frisvold said Yuma produce generated about $275 million in sales in Arizona alone. He said Yuma uses about two-thirds of an acre foot of water to sell $1,000 worth of vegetables. “The average for the entire Colorado basin, Lower Basin and Upper Basin is more than double what Yuma is using,” Frisvold said.