City Farm turns fallow, vacant land into amazingly productive farmland. The benefits are tangible: instead of an acre of crumbling cement and overgrown weeds we have created a viable farm that produces 25,000 pounds of heirloom tomatoes, arugula, beets, carrots, herbs; and jobs for farmers, a green space that attracts hordes of volunteers, students and other visitors. Volunteers are required to make a $5 donation.