1. USDA‐ARS, Plains Area, Oklahoma and Central Plains Agricultural Research Center, Agroclimate and Hydraulics Engineering Research Unit 7207 West Cheyenne St. El Reno Oklahoma 73036 USA
2. Water Resources Center, University of Minnesota 1985 Buford Ave. St. Paul Minnesota 55108 USA
3. USDA‐ARS, Soil Drainage Research Unit 590 Woody Hays Dr. Columbus Ohio 43210 USA