The government’s new plan: Get farmers’ extra food to needy families. It’s harder than it sounds.

Farmers in the upper Midwest euthanize their baby pigs because the slaughterhouses are backing up or closing, while dairy owners in the region dump thousands of gallons of milk a day. In Salinas, Calif., rows of ripe iceberg, romaine and red-leaf lettuce shrivel in the spring sun, waiting to be plowed back into the earth.