Crouching in a verdant pasture in the early summer sun, Eduardo Sousa plucks a few blades of grass and extends them toward a flock of geese. “Hello, my darlings,” he coos. “Hello, hello, hello.” It is the Spanish farmer’s first visit to the Stone Barns Center, a farm and education center dedicated to sustainable agriculture in Pocantico Hills, some 30 miles north of New York City, and Sousa is impressed with what he sees
