01510nam 2200397 a 450 991070106960332120120103091307.0(CKB)5470000002414339(OCoLC)770008418(EXLCZ)99547000000241433920120103d2011 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierNitrogen in agricultural systems[electronic resource] implications for conservation policy /Marc Ribaudo ... [and others][Washington, D.C.] :U.S. Dept. of Agriculture, Economic Research Service,[2011]1 online resource (v, 82) pages color illustrationsEconomic research report ;no. 127Title from PDF title screen (viewed Dec. 29, 2011)."September 2011."Includes bibliographical references (pages 51-62).Nitrogen in agricultural systems Nitrogen fertilizersEnvironmental aspectsUnited StatesAgricultural conservationUnited StatesNitrogen fertilizersEnvironmental aspectsAgricultural conservationRibaudo Marc1390140United States.Department of Agriculture.Economic Research Service.GPOGPOBOOK9910701069603321Nitrogen in agricultural systems3464520UNINA