Agriculture and gardening are two keen personal interests. I happened to catch this story on NPR. Prairie Pioneer Seeks To Reinvent The Way We Farm http://www.npr.org/templates/story/story.php?storyId=113766846 by Richard Harris Wes Jackson's group, The Land Institute, are attempting to cross-breed wild perennials with domesticated food grains such as wheat. The idea is to eliminate the need to plow on an annual basis. Great idea! Another concept is to use green manures to fix nitrogen, add carbon to the soil, prevent erosion and suppress weeds.