Soil Pipe Flow and Internal Erosion: What We Don't Know Can Kill Us.
Glenn V. Wilson, 598 McElroy Dr, USDA-ARS, Oxford, MS, Garey A. Fox, Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC and John L. Nieber, 1390 Eckles Avenue, University of Minnesota-Twin Cities, St. Paul, MN