Juglans nigra Black Walnut Juglandaceae
| FIA distributions (998 counties) quartiles: | min | 1st | mean | median | 3rd | max | rank |
| Diameter, cm (4549 plots) | 0.3 | 17.8 | 26.5 | 26.4 | 34.5 | 105.7 | 21 |
| Growth Rate, cm2/yr (1453 plots) | 0.1 | 8.2 | 17.0 | 14.4 | 22.5 | 101.7 | 40 |
| Annual Temperature, °C | 2.2 | 9.8 | 11.7 | 11.8 | 13.4 | 19.8 | 50 |
| January Temperature, °C | -14.1 | -4.3 | -1.7 | -1.6 | 0.8 | 10.4 | 48 |
| Precipitation, mm | 534 | 920 | 1050 | 1040 | 1170 | 1930 | 55 |
| Potential Evapotranspiration, mm/month | 12.6 | 55.9 | 64.9 | 64.6 | 72.8 | 130.0 | 56 |
| Maximum Elevation, m | 15 | 261 | 422 | 337 | 464 | 2000 | 26 |
| Slope, percent | 0.0 | 5.0 | 11.8 | 9.1 | 15.8 | 49.8 | 26 |
| pH | 2.5 | 4.0 | 4.9 | 4.7 | 5.8 | 7.3 | 39 |
| Permeability, cm/hr | 0.3 | 1.0 | 1.7 | 1.4 | 2.0 | 12.5 | 66 |
| Organic Matter, percent | 0.9 | 1.8 | 2.7 | 2.3 | 3.0 | 20.7 | 34 |
| Clay, percent | 4.4 | 20.9 | 25.1 | 25.8 | 29.4 | 47.3 | 9 |
| Water-Holding Capacity, cm/cm | 3.6 | 6.2 | 7.8 | 7.4 | 9.4 | 12.1 | 28 |