Soil Properties, Hydrology, and Water Quality of Perennial Vegetation on Undisturbed Soil in Southwestern Minnesota Date Issued 2016-05 Author Tollefson, David Main Topic Water Quality & Pollutants Hydrology
Minnesota National Lakes Assessment: Pesticides in Minnesota Lakes Image Date Issued 2014-01 Author Tollefson, David Ribikawskis, Matthew VanRyswyk, Bill Main Topic Water Quality & Pollutants Water Monitoring & Assessment
Sentinel Lake Assessment Report Carrie Lake (34-0032) Kandiyohi County, Minnesota Image Date Issued 2012-07 Author Engel, Lee Heiskary, Steve Valley, Ray Tollefson, David Main Topic Water Monitoring & Assessment
Soil properties, hydrology, and water quality of perennial vegetation on undisturbed soil in Southwestern Minnesota Image Date Issued 2016 Author Tollefson, David Main Topic Surface Water Water Conveyance & Hydraulics Hydrology Water Economics
Cottonwood River Native Vegetation Water Quality Image Date Issued 2014 Author Tollefson, David Strock, Jeffrey S. Birr, Adam S. VanRyswyk, William Main Topic Surface Water Water Quality & Pollutants
Minnesota National Lakes Assessment Project: Pesticides in Minnesota Lakes Image Date Issued 2008-10 Author VanRyswyk, William Tollefson, David Main Topic Surface Water Water Quality & Pollutants Water Conveyance & Hydraulics
Evaluation of an ELISA Method for Acetochlor Analysis in the Le Sueur River Watershed Image Date Issued 2009-12 Author VanRyswyk, William Tollefson, David Main Topic Surface Water Water Quality & Pollutants Water Conveyance & Hydraulics
Le Sueur River and Little Beauford Ditch Acetochlor Impairment Response Image Date Issued 2013 Author VanLieshout, Larry Ribikawskis, Matt Struss, Ron Tollefson, David VanRyswyk, Bill Zachmann, Joseph Main Topic Surface Water Water Quality & Pollutants Water Monitoring & Assessment