Pimentel, DavidHepperly, PaulHanson, JamesSeidel, RitaDouds, David2005-07-212005-07-212005-07https://hdl.handle.net/1813/2101342564 bytesapplication/pdfen-USFarmingOrganicEnvironmentEconomicsFertilizerSoilCrop YieldsAgricultureOrganic and Conventional Farming Systems: Environmental and Economic Issues.technical report