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Date: 2013-10-09 02:36:19Water Hydrology Optical materials Natural resources Surface runoff Aquifer Groundwater Water cycle Soil Infiltration Water quality Vadose zone | Pesticides and Water Quality Principles, Policies, and ProgramsAdd to Reading ListSource URL: www.extension.purdue.eduDownload Document from Source WebsiteFile Size: 3,63 MBShare Document on Facebook |