A gleaming vision of the agricultural future has come to the Appalachian hamlet of Morehead, Ky. Several hundred “crop care specialists” in brightly colored T-shirts show up every day at AppHarvest, a low-slung complex of Dutch-style greenhouses that covers three million square feet. They dutifully remove shoots and otherwise tend to 720,000 plants yielding tomatoes, strawberries, and other produce items that never touch the outdoors before they’re harvested and shipped off to …