1. Purdue University, West Lafayette, Indiana
2. National Drought Mitigation Center, University of Nebraska—Lincoln, Lincoln, Nebraska
3. Illinois State Water Survey, Prairie Research Institute, University of Illinois at Urbana–Champaign, Urbana, Illinois
4. Iowa State University, Ames, Iowa
5. University of Michigan, Ann Arbor, Michigan
6. Michigan State University, East Lansing, Michigan
7. South Dakota State University, Brookings, South Dakota