Art: Nat Damm Rob Jones Cofounder, Crop Mob Carrboro, N.C. Like a growing number of young folks across the country, Rob Jones, 27, likes to get his hands in the dirt, making his foodshed and community more robust and vibrant. Once each month, Jones and a band of young agrarians alight upon an area farm. Calling themselves the Crop Mob, they do a big project together—say, break new ground for raised beds or harvest a labor-intensive crop like sweet potatoes. The host farmers make a big meal, and everyone eats together. Sustainable agriculture is “way, way, way more labor-intensive than …