Table 2. Selected variables of site or soil profile property in Quercus mongolica stands.
| Horizon | Variable | Mean | Standard deviation | Minimum | Maximum |
| A horizon (n=91) | Site index | 15.5 | 2.5 | 11.0 | 19.0 |
| Altitude (m) | 717 | 262 | 166 | 1,192 |
| Aspect (°) | 177 | 90 | 2 | 354 |
| Solpe (°) | 31 | 6 | 13 | 41 |
| Soil depth (cm) | 16 | 7 | 3 | 40 |
| Hue | 8 | 1.2 | 5 | 10 |
| Chroma | 3.1 | 0.8 | 1 | 4 |
| Value | 2.7 | 0.7 | 2 | 4 |
| B horizon (n=112) | Site index | 15.0 | 2.1 | 10.7 | 19.5 |
| Altitude (m) | 696 | 273 | 166 | 1,268 |
| Aspect (°) | 185 | 93 | 2 | 354 |
| Solpe (°) | 30 | 7 | 13 | 41 |
| Soil depth (cm) | 40 | 16 | 15 | >100 |
| Hue | 8.1 | 1.3 | 5 | 10 |
| Chroma | 5.1 | 1.3 | 2 | 8 |
| Value | 4.1 | 0.6 | 2 | 5 |