In an ARS research plot in South Carolina, geneticist Mark Farnham collects broccoli for heat-tolerance evaluations. (USDA-ARS U.S. Vegetable Laboratory, D3832-1)
A heat-tolerant broccoli hybrid in an ARS research field in South Carolina. The marker pen indicates optimal head size for harvest. (USDA-ARS U.S. Vegetable Laboratory, D3833-2)