Dimensions of willow oak trees tested.
| Parameter | Group 1 | Group 2 | Group 3 | |||
|---|---|---|---|---|---|---|
| Pulled to failure | Linear root cut | Individual cuts | ||||
| Mean | Standard deviation | Mean | Standard deviation | Mean | Standard deviation | |
| dbh at 1.4 m (4.6 ft) | 12.6 cm (5 in) | 1.2 | 12.2 cm (4.9 in) | 1.9 | 13.6 cm (5.4 in) | 1.4 |
| Caliper at 15 cm (6 in) | 16.5 cm (6.6 in) | 1.3 | 15.8 cm (6.3 in) | 2.1 | 17.9 cm (7.2 in) | 1.8 |
| Height | 7.3 m (24.1 ft) | 0.8 | 7.2 m (23.8 ft) | 0.4 | 6.8 m (22.4 ft) | 0.6 |
| Branch spread | 4.6 m (15.2 ft) | 0.5 | 4.9 m (16.2 ft) | 0.5 | 4.5 m (14.9 ft) | 0.6 |
| Number of trees | 8 | 11 | 10 | |||
dbh = diameter at breast height.