| 1 (2) | United States Department of Agriculture | USA |  |
| 2 (10) | Stanford University * | USA |  |
| 3 (15) | Harvard University * | USA | |
| 4 (16) | University of Florida * | USA | |
| 5 (17) | National Aeronautics and Space Administration * | USA | |
| 6 (24) | Michigan State University | USA | |
| 7 (25) | Pennsylvania State University * | USA | |
| 8 (36) | University of California, Berkeley * | USA | |
| 9 (41) | Colorado State University, Fort Collins * | USA | |
| 10 (47) | Oregon State University | USA | |
| 11 (49) | National Oceanic and Atmospheric Administration | USA | |
| 12 (50) | University of Illinois at Urbana-Champaign * | USA | |
| 13 (51) | University of Nebraska, Lincoln | USA | |
| 14 (56) | California Institute of Technology * | USA | |
| 15 (57) | United States Geological Survey | USA | |
| 16 (60) | University of Wisconsin, Madison * | USA | |
| 17 (64) | Jet Propulsion Laboratory | USA | |
| 18 (65) | Kansas State University | USA | |
| 19 (66) | University of Connecticut, Storrs * | USA | |
| 20 (71) | University of Washington * | USA | |
| 21 (73) | North Carolina State University | USA | |
| 22 (82) | Cornell University * | USA | |
| 23 (94) | Indiana University-Bloomington | USA | |
| 24 (95) | Iowa State University | USA | |
| 25 (96) | University of California, Merced | USA | |
| 26 (98) | University of California, Davis * | USA | |
| 27 (99) | University of Idaho | USA | |
| 28 (101) | Northern Arizona University | USA | |
| 29 (102) | Washington State University, Pullman * | USA | |
| 30 (109) | University of Colorado, Boulder * | USA | |
| 31 (116) | University of Georgia | USA | |
| 32 (119) | Duke University * | USA | |
| 33 (121) | Purdue University | USA | |
| 34 (124) | Ohio State University, Columbus * | USA | |
| 35 (132) | NASA Goddard Space Flight Center | USA | |
| 36 (136) | Arizona State University | USA | |
| 37 (139) | Utah State University * | USA | |
| 38 (142) | Lawrence Berkeley National Laboratory * | USA | |
| 39 (154) | University of Michigan, Ann Arbor * | USA | |
| 40 (156) | Oak Ridge National Laboratory | USA | |
| 41 (173) | University of California, Los Angeles * | USA | |
| 42 (174) | Virginia Polytechnic Institute and State University | USA | |
| 42 (174) | Yale University * | USA | |
| 44 (179) | Texas A&M University, College Station * | USA | |
| 45 (184) | University of Arizona * | USA | |
| 46 (186) | University of New Hampshire | USA | |
| 47 (188) | University of Kentucky * | USA | |
| 48 (196) | University of Minnesota, Twin Cities * | USA | |
| 49 (197) | University of Nevada-Reno | USA | |
| 50 (204) | US Environmental Protection Agency | USA | |
| 51 (207) | University of Utah * | USA | |
| 52 (211) | University of North Carolina, Chapel Hill * | USA | |
| 53 (221) | University of Montana, Missoula | USA | |
| 54 (231) | University of Missouri, Columbia * | USA | |
| 55 (234) | University of Alabama, Tuscaloosa | USA | |
| 56 (254) | Rutgers, The State University of New Jersey | USA | |
| 57 (255) | University of Virginia * | USA | |
| 58 (258) | State University of New York, College of Environmental Science and Forestry | USA | |
| 59 (270) | University of Maine, Orono | USA | |
| 60 (271) | University of Hawaii, Manoa * | USA | |
| 61 (276) | University of Vermont | USA | |
| 62 (282) | Pacific Northwest National Laboratory | USA | |
| 63 (283) | University of Maryland, College Park * | USA | |
| 64 (287) | Humboldt State University | USA | |
| 65 (289) | Mississippi State University | USA | |
| 66 (297) | University of Tennessee, Knoxville * | USA | |
| 67 (304) | University of Massachusetts, Amherst | USA | |
| 68 (310) | Oklahoma State University, Stillwater | USA | |
| 69 (311) | Clemson University | USA | |
| 70 (319) | Auburn University | USA | |
| 71 (320) | University of Maryland, Baltimore | USA | |
| 72 (327) | Michigan Technological University | USA | |
| 73 (329) | West Virginia University * | USA | |
| 74 (332) | Louisiana State University, Baton Rouge | USA | |
| 75 (343) | Montana State University, Bozeman | USA | |
| 76 (411) | New Mexico State University | USA | |
| 77 (444) | Louisiana State University Agricultural Center | USA |  |
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