YUMA, Ariz. (AP) — University of Arizona scientists are hoping to find more answers about what caused a romaine lettuce outbreak that sickened dozens and put the spotlight on Yuma farmers last year.

Researchers with the UofA Cooperative Extension are moving forward with a multiyear study of the environment and growing practices in the "winter vegetable capital," the university announced last week.

They will be partnering with the U.S. Food and Drug Administration, state agriculture officials and local growers.

"It's really rare to see a project like this, to see all three entities working toge...