A cover crop is a crop planted primarily to manage soil erosion, soil fertility, soil quality, water, weeds, pests, diseases, biodiversity and wildlife in an agroecosystem. Cover crops are of interest in sustainable agriculture as many of them improve the sustainability of agroecosystem attributes and may also indirectly improve qualities of neighboring natural ecosystems. One of the primary uses of cover crops is to increase soil fertility. source/wikipedia Learn more ... What Are Cover Crops and How To Use Them in Your Garden >