A century of changing land-use and water-quality relationships in the continental US Date Issued 2009 Author Turner, R. Eugene Broussard, Whitney Main Topic Water Conveyance & Hydraulics
Long-Term Observations of Vadose Zone and Groundwater Nitrate Concentrations under Irrigated Agriculture Image Date Issued 2009 Author Derby, Nathan E. Casey, Francis X. M. Knighton, Raymond E. Main Topic Groundwater Water Conveyance & Hydraulics Water Economics
Nitrogen Rates Image Date Issued 2005 (year uncertain) Author Sawyer, John Randall, Gyles W. Main Topic Water Monitoring & Assessment Water Economics
Estimated Nutrient Concentrations and Continuous Water-Quality Monitoring in the Eucha-Spavinaw Basin, Northwestern Arkansas and Northeastern Oklahoma, 2004–2007 Image Date Issued 2009 Author Christensen, Victoria G. Esralew, Rachel A. Allen, Monica L. Main Topic Surface Water Water Quality & Pollutants Water Conveyance & Hydraulics
