William G. Crumpton

Integrated Drainage-Wetland Systems for Reducing Nitrate Loads from Tile Drained Landscapes

Matthew J. Helmers, William G. Crumpton, 2004 .

Scientific Basis for Goals and Management Options

Alan F. Blumberg, Kenneth H. Reckhow, Kyle R. Mankin, 2010 .

Factors affecting nitrogen loss in experimental wetlands with different hydrologic loads

William G. Crumpton, W. Crumpton, Richard Gregory Phipps, 1994 .

Predicting effects of drainage water management in Iowa's subsurface drained landscapes

Matthew J. Helmers, Ranvir Singh, William G. Crumpton, 2007 .

Using Soil Surveys to Map Quaternary Parent Materials and Landforms across the Des Moines Lobe of Iowa and Minnesota

Bradley A. Miller, William G. Crumpton, C. Lee Burras, 2008 .

Rating curve estimation of nutrient loads in Iowa rivers

Matthew J. Helmers, Greg A. Stenback, William G. Crumpton, 2011 .