1. Soil Health Institute Morrisville NC 27560 USA
2. Carrington Research Extension Center North Dakota State Univ. Carrington ND 58421 USA
3. Poultry Production and Product Safety Research Unit USDA ARS Fayetteville AR 72701 USA
4. Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Tlaltizapán Mor 62770 Mexico
5. Dep. of Crop and Soil Sciences Washington State Univ. Puyallup WA 98371 USA
6. Soil and Water Management Research USDA‐ARS Bushland TX 79012 USA
7. Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias (INIFAP) Ciudad de México CDMX 04010 Mexico
8. Dep. of Horticulture Michigan State Univ. East Lansing MI 48824 USA
9. West River Ag Center South Dakota State Univ. Rapid City SD 57703 USA
10. Agriculture and Agri‐Food Canada Edmonton AB T5J 4C3 Canada
11. Food and Nutritional Science Univ. of Alberta Dep. of Agriculture Edmonton AB T6G 2P5 Canada
12. Extension Agricultural Engineering Univ. of Missouri Rock Port MO 64482 USA
13. Panhandle Research and Extension Center Univ. of Nebraska‐Lincoln Scottsbluff NE 69361 USA
14. School of Environment & Natural Resources Ohio State Univ. Wooster OH 44691 USA
15. Dep. of Plant Agriculture Univ. of Guelph Guelph ON N1G 2W1 Canada
16. Pasture Systems & Watershed Management Research Unit USDA ARS University Park PA 16802 USA
17. Rangeland Resources and Systems Research Unit USDA ARS Cheyenne WY 82009 USA
18. Coastal Plains Soil, Water, & Plant Research Center USDA‐ARS Florence SC 29501 USA
19. Dep. of Plant Science Pennsylvania State Univ. University Park PA 16802 USA
20. Dep. of Renewable Resources Univ. of Alberta Edmonton AB T6G 2H1 Canada
21. Lethbridge Research and Development Centre Agriculture and Agri‐Food Canada Lethbridge AB T1J 4B1 Canada
22. Dep. of Plant Science Univ. of Manitoba Winnipeg MB R3T 2N2 Canada
23. Santiago de Querétaro Sustentabilidad Agropecuaria Querétaro (SAQ) Qro 76030 Mexico
24. Dep. of Soil and Crop Sciences Colorado State Univ. Fort Collins CO 80523 USA
25. Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT) Texcoco Ver 56237 Mexico
26. Agroclimate and Natural Resources Research USDA‐ARS El Reno OK 73036 USA
27. Texas A&M AgriLife Research Beeville TX 78102 USA
28. Environment & Soil Sciences Louisiana State Univ. School of Plant Baton Rouge LA 70803 USA
29. Dep. of Crop, Soil and Environmental Sciences Auburn Univ. Auburn AL 36849 USA
30. Dep. of Crop and Soil Sciences Washington State Univ. Mount Vernon WA 98273 USA
31. Dep. of Plant and Soil Science, Research and Education Center Univ. of Kentucky Princeton KY 42445 USA
32. W.K. Kellogg Biological Station Michigan State Univ. Hickory Corners MI 49060 USA
33. Dep. of Soil and Crop Sciences Texas A&M AgriLife Research College Station TX 77843 USA
34. Southern Research and Outreach Center Univ. of Minnesota Waseca MN 56093 USA
35. USDA ARS Tucson AZ 85719 USA
36. Cropping Systems and Water Quality Research Unit USDA ARS USDA‐ARS Columbia MO 65211 USA
37. Dep. of Agronomy, Horticulture and Plant Science South Dakota State Univ. Brookings SD 57007 USA
38. Dep. of Natural Resources Cornell Soil Health Laboratory, Dep. of Soil and Crop Sciences Cornell Univ. Ithaca NY 14853 USA
39. Dep. of Soil and Crop Sciences Texas A&M Agrilife Research Lubbock TX 79403 USA
40. Dep. of Agronomy Iowa State Univ. Ames IA 50011 USA
41. Centro de Bachillerato Tecnológico Agropecuario No. 305 ‐ CBTA 305 Molcaxac Pue 75650 Mexico
42. Columbia Basin Agricultural Research Center Oregon State Univ. Adams OR 97810 USA
43. Agriculture and Agri‐Food Canada Canada Indian Head Research Farm Indian Head SK S0G 2K0 Canada
44. School of Natural Resources & the Environment Univ. of Arizona Tucson AZ 85721 USA
45. Davis Dep. of Plant Sciences Univ. of California Davis CA 95616 USA
46. Dep. of Crop and Soil Science Oregon State Univ. Corvallis OR 97331 USA
47. Greenley Research Center Univ. of Missouri Novelty MO 63460 USA
48. Dep. of Agricultural and Environmental Sciences Tennessee State Univ. Nashville TN 37209 USA
49. North Central Agricultural Research Laboratory USDA ARS Brookings SD 57006 USA
50. Davis College of Agriculture, Natural Resources and Design West Virginia Univ. Morgantown WV 26506 USA
51. Dep. of Plant and Soil Science Univ. of Kentucky Lexington KY 40546 USA
52. Universidad Politécnica de Francisco I. Madero (UPFIM) San Juan Tepa Hgo 42660 Mexico
53. Soils and Climate Dep. Utah State Univ. Plants Logan UT 84322 USA
54. Bradford Research Center College of Agriculture, Food, and Natural Resources Univ. of Missouri Columbia MO 65201 USA
55. Eastern Shore Agricultural Research and Extension Center Virginia Tech Painter VA 23420 USA
56. Dep. of Agronomy Kansas State Univ. Manhattan KS 66506 USA
57. Rodale Institute Farming Systems Trial Kutztown PA 19530 USA
58. Crops, Soils, and Environmental Management Program, School of Agricultural Sciences Southern Illinois Univ. Carbondale IL 62901 USA
59. Northern Plains Agricultural Research Laboratory USDA ARS Sidney MT 59270 USA
60. Dep. of Agronomy Univ. of Wisconsin Madison WI 53706 USA
61. Dryland Research Station Washington State Univ. Lind WA 99341 USA
62. Dep. of Soil and Crop Sciences Cornell Univ. Cornell Soil Health Laboratory Ithaca NY 14853 USA
63. SW Research ‐ Extension Center Kansas State Univ. Tribune KS 67879 USA
64. Davis Dep. of Land, Air, and Water Resources Univ. of California Davis CA 95616 USA
65. Center for Agricultural Resources Research USDA ARS Fort Collins CO 80526 USA
66. Univ. of Florida Quincy FL 32351 USA
67. Agriculture and Agri‐Food Canada Swift Current Research and Development Centre Swift Current SK S9H 3×2 Canada
68. Dep. of Soil, Water and Climate, SW Research & Outreach Center Univ. of Minnesota Lamberton MN 56152 USA
69. Lincoln School of Natural Resources Univ. of Nebraska Lincoln NE 68583 USA
70. Dep. of Plant Sciences Univ. of Tennessee Knoxville TN 37996 USA
71. Dep. of Crop & Soil Sciences Washington State Univ. Pullman WA 99164 USA
72. School of Environmental Sciences ‐ Ridgetown Campus Univ. of Guelph Ridgetown ON N0P 2C0 Canada
73. International Maize and Wheat Improvement Center (CIMMYT) Carretera Mexico‐Veracruz km 45 Texcoco Mexico
74. Agronomy Dep. Purdue Univ. West Lafayette IN 47907 USA
75. Agriculture and Agri‐Food Canada Harrow Research and Development Center Harrow ON N0R 1G0 Canada
76. National Soil Dynamics Laboratory USDA‐NSDL Auburn AL 36832 USA