Table 1. Site characteristics, where Lat = Latitude, Long = Longitude, El = Elevation, Temp = Mean Annual Air Temperature, Precip = Mean annual Bulk Precipitation, CH = Canopy Height, CS = Canopy Structure, CL = closed, SS = short stature, O = open, SO = semi-open.
| Site | Lat (°) | Long (°) | El (m.a.s.l) | Temp (°C) | Precip (mm) | CH (m) | Ecosystem type | CS | Soil order | Owner |
| Harvard Forest | 42.54 | −72.17 | 348 | 7 | 1066 | 26.0 | Temperate deciduous forest | CL | Spodosol | Harvard U |
| Burlington | 42.52 | −71.18 | 38 | 9 | 1095 | 24.0 | Temperate deciduous forest | CL | Inceptisol | Town of Burlington MA |
| Bartlett Exp. Forest | 44.06 | −71.29 | 273 | 7 | 1219 | 23.0 | Temperate deciduous forest | CL | Spodosol | USDA FS |
| Blandy Farm | 39.06 | −78.07 | 182 | 12 | 972 | 1.0 | Shrubland | SS | Ultisol-Alfisol | U Virginia |
| Smithsonian CRC (SCBI) | 38.89 | −78.14 | 355 | 13 | 1057 | 35.0 | Temperate deciduous forest | CL | Alfisol | Smithsonian Institution |
| Smithsonian SERC | 38.89 | −76.56 | 10 | 13 | 1097 | 38.0 | Temperate deciduous forest | CL | Ultisol | Smithsonian Institution |
| Ordway-Swisher BS | 29.69 | −81.99 | 48 | 20 | 750 | 23.0 | Temperate coniferous forest | O | Entisol | U Florida Foundation |
| J. Jones Ecological Research station | 31.19 | −84.47 | 47 | 19 | 1344 | 27.0 | Temperate coniferous forest | CL | Ultisol | Robert W. Woodruff Foundation |
| Disney Wilderness Preserve | 28.13 | −81.44 | 20 | 22 | 1219 | 1.5 | Grassland | SS | Spodosol | Nature Conservancy |
| Guanica State Forest | 17.97 | −66.87 | 126 | 23 | 840 | 10.0 | Tropical deciduous forest | CL | Aridisol | State Forest, Dept. Natural and Environmental Resources, Puerto Rico |
| Lajas Ag. Exp. St. | 18.02 | −67.08 | 16 | 25 | 830 | 0.4 | Agricultural | SS | Vertisol | U Puerto Rico |
| Ponce | 17.99 | −66.64 | 1 | 27 | 901 | 5.0 | Savanna | O | Mollisol | Municipality of Ponce, PR |
| Steigerwaldt | 45.51 | −89.58 | 477 | 5 | 809 | 5.5 | Temperate deciduous forest | SO | Spodosol | Steigerwaldt Land Services |
| Tree Haven | 45.49 | −89.59 | 461 | 5 | 809 | 23.0 | Temperate deciduous forest | CL | Spodosol | University of Wisconsin Stevens Point |
| UNDERC | 46.23 | −89.54 | 520 | 5 | 751 | 24.0 | Temperate deciduous forest | CL | Spodosol | U Notre Dame |
| Konza - Core | 39.10 | −96.56 | 415 | 13 | 835 | 1.5 | Grassland | SS | Mollisol | Nature Conservancy/Kansas State U |
| Konza - Relocatable | 39.11 | −96.61 | 323 | 13 | 835 | 1.5 | Agricultural | SS | Mollisol | Nature Conservancy/Kansas State U |
| U Kansas Bio Station | 39.04 | −95.19 | 321 | 14 | 940 | 19.0 | Temperate deciduous forest | CL | Inceptisol | U Kansas |
| Oak Ridge Nat'l Lab | 35.96 | −84.28 | 342 | 15 | 1352 | 28.0 | Temperate deciduous forest | CL | Ultisol | US DOE |
| Great Smokey Mtns NP | 35.69 | −83.50 | 661 | 13 | 1453 | 30.0 | Temperate deciduous forest | CL | Ultisol | *US NPS |
| Mountain Lake Res. Stn. | 37.38 | −80.52 | 1170 | 8 | 1131 | 18.0 | Temperate deciduous forest | CL | Entisol | U Virginia |
| Talladega Nat'l Forest | 32.95 | −87.39 | 164 | 15 | 1384 | 25.0 | Temperate coniferous forest | SO | Ultisol | USDA FS |
| Choctaw NWA | 31.85 | −88.17 | 11 | 18 | 1524 | 35.0 | Temperate deciduous forest | CL | Inceptisol | DOI NWA |
| Dead Lake WMA | 32.54 | −87.80 | 24 | 17 | 1415 | 30.0 | Temperate deciduous forest | CL | Ultisol | US Army Corps of Engineers |
| Dakota-Coteau | 47.16 | −99.11 | 575 | 4 | 478 | 0.4 | Grassland | SS | Mollisol | State of North Dakota Land Trust |
| Northern Great Plains Res. Lab | 46.77 | −100.92 | 589 | 5 | 434 | 0.4 | Agricultural | SS | Mollisol | USGS/DOI FWS |
| Woodworth | 47.13 | −99.24 | 590 | 4 | 478 | 1.0 | Agricultural | SS | Mollisol | USGS/DOI FWS |
| Central Plains Exp. Range | 40.82 | −104.75 | 1653 | 9 | 322 | 0.4 | Grassland | SS | Mollisol | USDA ARS |
| Sterling | 40.46 | −103.03 | 1365 | 10 | 422 | 1.0 | Agricultural | SS | Mollisol | Private, |
| Rocky Mtn. NP (Castnet) | 40.28 | −105.55 | 2742 | 7 | 998 | 19.0 | Temperate coniferous forest | SO | - | DOI NPS |
| LBJ Nat'l grasslands | 33.40 | −97.57 | 272 | 18 | 864 | 13.0 | Temperate deciduous forest | SO | Alfisol | USDA FS |
| M. Klemme Range Res. Station | 35.41 | −99.06 | 520 | 15 | 780 | 1.0 | Agricultural | SS | Inceptisol | Oklahoma State U, Oklahoma Agricultural Experimental Station |
| Northcutt | 33.89 | −96.84 | 212 | 17 | 970 | 4.0 | Savanna | O | Inceptisol | Private, |
| Bozeman | 45.66 | −111.05 | 1503 | 7 | 491 | 1.0 | Agricultural | SS | Mollisol | Montana State U |
| Loch Leven | 45.46 | −110.62 | 1448 | 6 | 432 | 0.4 | Grassland | SS | Mollisol | Montana Dept of Fish, Wildlife and Parks |
| Yellowstone NP | 44.95 | −110.54 | 2129 | 7 | 249 | 14.0 | Temperate coniferous forest | SO | - | *DOI NPS |
| Niwot Ridge | 40.05 | −105.58 | 3478 | −4 | 930 | 0.2 | Tundra | SS | Inceptisol | USDA FS |
| Fraser Exp. Forest | 39.86 | −105.86 | 3526 | 1 | 584 | 14.0 | Boreal/montane coniferous forest | SO | Inceptisol | USDA FS |
| Moab | 38.25 | −109.39 | 1800 | 14 | 239 | 0.2 | Grassland | SS | Aridisol | BLM |
| Santa Rita Exp. Range | 31.91 | −110.84 | 999 | 22 | 303 | 2.0 | Shrubland | SS | Entisol | U Arizona |
| Jornada Exp. Range | 32.59 | −106.84 | 1321 | 18 | 241 | 0.4 | Grassland | SS | Aridisol | USDA ARS |
| Onaqui-Benmore | 40.18 | −112.45 | 1654 | 9 | 274 | 1.2 | Shrubland | SS | Aridisol | BLM/USDA FS |
| Murray | 40.65 | −111.92 | 1302 | 12 | 450 | 1.0 | Grassland | SS | - (anthropodisol) | City of Murray, UT |
| Red Butte | 40.78 | −111.80 | 1676 | 12 | 450 | 10.0 | Temperate deciduous forest | CL | Mollisol | USDA FS/U Utah |
| Wind River RNA | 45.82 | −121.95 | 368 | 9 | 2223 | 50.0 | Temperate coniferous forest | CL | Andisol | USDA FS |
| Abby Road | 45.76 | −122.33 | 367 | 9 | 2249 | 1.0 | Temperate coniferous forest | SS | Andisol | State of Washington Dept. Natural Resources |
| Thayer | 45.71 | −122.34 | 557 | 9 | 2249 | 12.0 | Temperate coniferous forest | CL | Inceptisol | State of Washington Dept. Natural Resources |
| Thyme | 45.71 | −122.38 | 301 | 9 | 2249 | 1.0 | Temperate coniferous forest | SS | Ultisol | State of Washington Dept. Natural Resources |
| Good Seed | 45.78 | −122.30 | 559 | 9 | 2249 | 1.0 | Temperate coniferous forest | SS | Ultisol | State of Washington Dept. Natural Resources |
| Soaproot Saddle | 37.03 | −119.26 | 1210 | 13 | 957 | 32.0 | Temperate coniferous forest | SO | Alfisol | USDA FS |
| Lower Teakettle | 37.01 | −119.01 | 2149 | 8 | 957 | 35.0 | Temperate coniferous forest | SO | Entisol-Inceptisol | USDA FS |
| San Joaquin Exp. Range | 37.11 | −119.73 | 397 | 17 | 375 | 21.0 | Savanna | O | Alfisol-Inceptisol | USDA FS |
| Toolik Lake LTER | 68.66 | −149.37 | 827 | −9 | 316 | 0.3 | Tundra | SS | Gelisol | BLM |
| Pump Station 2 | 69.60 | −148.67 | 142 | −9 | 316 | 0.3 | Tundra | v | Gelisol | BLM |
| Barrow Exp. Observatory | 71.28 | −156.62 | 7 | −12 | 105 | 0.3 | Tundra | SS | Gelisol | Ukpeaġvik Iņupiat Corporation |
| Caribou-Poker | 65.15 | −147.50 | 239 | −3 | 262 | 8.0 | Boreal/montane coniferous forest | SO | Inceptisol | UAF |
| Poker Flats | 65.11 | −147.42 | 472 | −3 | 262 | 8.0 | Boreal/montane coniferous forest | SS | Inceptisol | Alaska Dept Natural Resource/UAF |
| Eight Mile Lake | 63.88 | −149.22 | 684 | −2 | 366 | 0.3 | Tundra | SS | Gelisol | Alaska Dept Natural Resource |
| Delta Junction | 63.88 | −145.75 | 504 | −3 | 305 | 10.0 | Boreal/montane coniferous forest | SO | Inceptisol | BLM |
| Kenai NWA | 60.53 | −150.58 | 110 | 1 | 483 | 12.0 | Boreal/montane coniferous forest | CL | Spodosol | DOI NWA |
All sites were given access to measure soil properties by the owner, no soil samples were taken, and (*) denotes that a research permit was needed to gain access to the site.
Note: - = soil order unknown, USDA = US Department of Agriculture, FS = Forest Service, ARS = Agricultural Research Service, DOI = US Department of Interior, BLM = US Bureau of Land Management, DOE = US Department of Energy, UAF = University of Alaska, Fairbanks, FWS = US Fish and Wildlife Service, USGA = US Geological Survey, NPS = National Park Service, LTER = long term ecological research site, NWA = National Wildlife Area, RNA = Research Natural Area, WMA = Wildlife Management Area, NP = National Park, BS = Biological Station.