1. Dep. of Soil Science; Univ. of Wisconsin-Madison; 1525 Observatory Dr. Madison WI 53706
2. USDA Dairy Forage Research Center; 1925 Linden Dr. West Madison WI 53706
3. Biological Systems Engineering Dep.; Univ. of Wisconsin-Madison; 460 Henry Mall Madison WI 53706
4. Dep. of Hydraulic and Environmental Engineering; Pontificia Universidad Católica de Chile; Vicuña Mackenna 4860 Macul Santiago Chile
5. USDA-ARS, 2615 Yellowstone Dr.; Marshfield WI 54449