State | Site | Location | Crop rotation | Tillage | Soil Series/texture | pH | EC (ds∙m−1) | Soil organic carbon (g∙kg−1) | Total Nitrogen (g∙kg−1) | Inorganic Nitrogen* (mg∙kg−1) | Field Capacity (g∙g−1) | High Temp.† (˚C) | Low Temp.† (˚C) | Precipitation† (mm) |
Maine | Frenchville | N 47.2161028, W −68.412227 | Potato-grain-clover | Conventional | Plaisted gravelly loam | 5.8 | 0.48 | 20 | 2.10 | 31.9 | 0.260 | 8.3 | −1.1 | 850 |
Tennessee | Jackson | N 35.6230, W −88.8465 | Continuous Cotton | No-tillage | Lexington silt loam | 5.4 | 0.32 | 10 | 1.40 | 47.8 | 0.261 | 21.6 | 9.4 | 1375 |
South Carolina | Blackville | N 33.346539, W −81.297283 | Continuous Corn | Strip-tillage | Duplin sandy loam | 5.6 | 0.09 | 5.0 | 0.60 | 14.8 | 0.053 | 25.6 | 11 | 1198 |
Minnesota | Downer | N 46.8655, W −96.396806 | Sugarbeet- Corn | Conventional | Lamoure silt loam | 8.1 | 0.16 | 15.5 | 1.60 | 14.1 | 0.118 | 11.6 | 0 | 573 |
North Dakota | Bismarck | N 47.4630, W −101.2772 | Spring Wheat-Soybean | No-tillage | Wilton silt loam | 7.3 | 0.17 | 21.7 | 2.30 | 32.6 | 0.265 | 12.8 | −1 | 453 |
North Dakota | Dickinson | N 47.19314, W −102.89661 | Continuous Wheat | No-tillage | Vebar-Parshall fine sandy loam | 5.2 | 0.14 | 17.0 | 1.70 | 16.9 | 0.239 | 12.8 | −1 | 400 |
Nebraska | North Bend | N41.429308, W −97.794056 | Corn-soybean | No-tillage | Nora silty clay loam | 6.7 | 0.10 | 15.4 | 1.80 | 23.3 | 0.120 | 16.1 | 3.9 | 763 |
Oregon | Pendleton | N 45.718439, W −118.626883 | Fallow-Winter Wheat | No-tillage | Walla Walla silt loam | 6.0 | 0.40 | 12.0 | 1.20 | 29.8 | 0.291 | 17.2 | 5.0 | 322 |