1. Swette Center for Sustainable Food Systems Arizona State Univ. PO Box 875502 Tempe AZ 85287 USA
2. Dep. of Environmental Sciences Univ. of North Carolina Wilmington 601 S. College Rd. Wilmington NC 28403 USA
3. Practical Farmers of Iowa 1615 Golden Aspen Dr. Ames IA 50010 USA
4. USDA‐ARS, National Laboratory for Agriculture and the Environment 1015 North University Boulevard Ames IA 50011 USA
5. Dep. of Agronomy Iowa State Univ. 716 Farmhouse Ln. Ames IA 50011 USA