Species with significantly different mean root length (mm) for each treatment and compass bearing. Means in the same row with a different letter are significantly different (P < 0.05).
| Species | North uncompacted | North compacted | South uncompacted | South compacted |
|---|---|---|---|---|
| C. sempervirens | 1094a | 1769b | 1909 | 1410 |
| O. europaea | 1616 | 1174 | 1670a | 992b |