1. Center for Agricultural Resources Research, United State Department of Agriculture–Agricultural Research Service, Fort Collins, CO 80526, USA
2. Department of Agricultural and Biological Engineering, Penn State University, State College, PA 16801, USA
3. Soil Drainage Research Unit, United State Department of Agriculture–Agricultural Research Service, Columbus, OH 43210, USA
4. Pioneer Farm, University of Wisconsin—Platteville, Platteville, WI 53818, USA
5. Department of Biological and Agricultural Engineering, North Carolina State University, Raleigh, NC 27695, USA
6. Department of Agricultural Sciences, Clemson University, Clemson, SC 29634, USA