1. USDA-ARS, National Soil Erosion Lab.; West Lafayette IN 47907
2. Dep. of Earth Sciences; Indiana Univ. Purdue Univ.; Indianapolis IN 46202
3. Dep. of Forest and Natural Resources Management, SUNY-ESF; Syracuse NY 13210
4. Dep. of Geography and Environmental Systems; Univ. of Maryland-Baltimore County; Baltimore MD 21250