Sarah Ramirez runs an organization that brings excess produce to the hungry. Here, she gleans apples from a front yard. Scott Anger/KQED hide caption

itoggle caption Scott Anger/KQED

Farmworkers harvest and package cantaloupes near Firebaugh, Calif. Gosia Wozniacka/AP hide caption

itoggle caption Gosia Wozniacka/AP

American farms like this iceberg lettuce field owned by Duda Farm Fresh Foods outside Salinas, Calif., are facing a dwindling supply of farmworkers from rural Mexico. Kirk Siegler hide caption

itoggle caption Kirk Siegler