Juicing wheatgrass was started in the 1950's by Ann Wigmore independent of the agricultural research above. Her story is fascinating (check out "Wheatgrass Nature's Finest Medicine" by Steve Meyerowitz). The essence is that she was a Boston resident of Lithuanian descent who suffered from a variety of ailments in her early life. Drawing on her peasant background and the experiences of her grandmother (a self taught naturalist), she healed herself with wild weeds, herbs and greens. She consumed many different types of greens and also fed the same to her animals. Her observations led her to conclude that wheatgrass was the best source of greens. One day, at a local yard sale, she picked up an old cast iron meat grinder. With a few modifications, the first wheatgrass juicer was born. Ann Wigmore later formed the Hippocrates Health Institute in Boston and worked with thousands of people over the years. Visitors to the institute were thrilled with their results and many of the health retreats across the country were formed by former Hippocrates clients.