Trucks were busily entering the Cordele State Farmers’ Market on July 2. People waited next to trailers filled with watermelons, many displaying one that had been sliced open to show a bright red or yellow interior. Melissa Delgado was selling watermelons. Her family buys them from farmers. She’s been selling them for decades. It’s been a challenging year with the heavy rains. Customers’ haggling for a deal can make turning a profit challenging.…