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Evaluation of the Effects of Agricultural Practices on Groundwater Quality
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50 feet acreage adsorption agricultural chemicals Agricultural Engineers agricultural practices Agronomy Agronomy Abstracts alachlor analytical application rates aquifer aquifer materials areas atrazine Bicki chisel plowing compounds concentrations conservation tillage Cooperative Extension Service corn and soybeans cover crops crop rotation decrease denitrification depth detection effects erosion evaluation Geological Survey ground surface groundwater contamination groundwater quality herbicides hydraulic conductivity hydrogeologic increase infiltration insecticides irrigation laboratory lDOA leaching of pesticides legumes lllinois Department lllinois State Geological lowa lSGS macropores moldboard plow monitoring nitrates nitrogen fertilizer no-till occur occurrence of agricultural organic carbon content percent pesticides pesticides and nitrates plant potential for contamination reported residue runoff rural lllinois sampling programs sandy soils sediments sludge Society of Agricultural soil properties Soil Science Soil Science Society soybeans statewide survey terraces tile drainage tillage practices tillage systems transport University of lllinois USEPA vulnerable to contamination water quality water table weed control