1. Nelson Institute for Environmental Studies University of Wisconsin‐Madison Madison Wisconsin 53706 USA
2. Department of Geographical Sciences University of Maryland College Park Maryland 20742 USA
3. Applied Geosolutions (AGS) Durham New Hampshire 03824 USA
4. Department of Soil Science University of Wisconsin‐Madison Madison Wisconsin 53706 USA
5. Department of Agronomy University of Wisconsin‐Madison Madison Wisconsin 53706 USA
6. Texas Agri‐Life Research and Extension Texas A&M University Temple Texas 76502 USA
7. USDA‐ARS Dairy Forage Research Center Madison Wisconsin 53706 USA