01214nam 2200349 450 991070411080332120200806102215.0(CKB)5470000002438561(OCoLC)933394731(EXLCZ)99547000000243856120151223d2015 ua 0engurbn||||a||||txtrdacontentcrdamediacrrdacarrierCropland conservation practices to protect groundwater sources of drinking water[Washington, D.C.] :United States Department of Agriculture,[2015]1 online resource (4 unnumbered pages)color illustrationsSoil conservationIowaGroundwaterPollutionIowaPreventionGroundwaterQualityIowaSoil conservationGroundwaterPollutionPrevention.GroundwaterQualityUnited States.Natural Resources Conservation Service.Iowa,GPOGPOBOOK9910704110803321Cropland conservation practices to protect groundwater sources of drinking water3267533UNINA