Quercus phellos Willow Oak Fagaceae
| FIA distributions (537 counties) quartiles: | min | 1st | mean | median | 3rd | max | rank |
| Diameter, cm (3032 plots) | 0.3 | 5.8 | 26.6 | 24.5 | 40.6 | 126.9 | 23 |
| Growth Rate, cm2/yr (1801 plots) | 0.2 | 18.8 | 42.3 | 32.8 | 55.8 | 325.4 | 6 |
| Annual Temperature, °C | 4.8 | 15.1 | 16.3 | 16.6 | 17.8 | 20.4 | 12 |
| January Temperature, °C | -3.4 | 3.6 | 5.6 | 5.6 | 7.8 | 12.3 | 13 |
| Precipitation, mm | 957 | 1170 | 1280 | 1260 | 1380 | 1780 | 15 |
| Potential Evapotranspiration, mm/month | 24.0 | 67.7 | 74.3 | 75.2 | 80.7 | 107.0 | 14 |
| Maximum Elevation, m | 5 | 97 | 193 | 155 | 213 | 1350 | 70 |
| Slope, percent | 0.6 | 2.5 | 6.9 | 5.5 | 9.4 | 47.8 | 66 |
| pH | 2.3 | 4.2 | 4.6 | 4.6 | 5.0 | 7.0 | 45 |
| Permeability, cm/hr | 0.2 | 1.1 | 2.3 | 1.6 | 3.3 | 9.2 | 47 |
| Organic Matter, percent | 0.8 | 1.3 | 2.2 | 1.6 | 2.0 | 27.0 | 79 |
| Clay, percent | 5.5 | 20.9 | 25.4 | 24.9 | 29.4 | 53.1 | 20 |
| Water-Holding Capacity, cm/cm | 3.6 | 6.7 | 7.7 | 7.4 | 8.9 | 11.3 | 29 |