Physical characteristics of birch (Betula pendula), holly (Ilex aquifolium), and evergreen oak (Quercus ilex) after grading.
| Attribute | Birch | Holly | Evergreen oak |
|---|---|---|---|
| Height (cm) | 98.3 (3.85) | 37.5 (0.13) | 46.0 (1.38) |
| Girth (cm) | 3.1 (0.13) | 1.8 (0.06) | 2.5 (0.09) |
| Height:girth ratio (cm/cm) | 31.7 (1.21) | 20.8 (0.83) | 18.4 (0.64) |
| Shoot dry weight (g) | 22.9 (0.97) | 3.8 (0.14) | 10.2 (0.41) |
| Root dry weight (g) | 32.7 (1.39) | 1.3 (0.04) | 24.2 (0.68) |
| Shoot:root ratio (g/g) | 0.70 (0.037) | 2.5 (0.10) | 0.42 (0.01) |
| Root area (cm2) | 707.0 (43.28) | 26.0 (0.88) | 93.4 (2.71) |
Values are mean and standard errors for 20 trees.