Percent of roots in various depth classes for live oak and sycamore 0.9 and 2.1 m from the trunk.
| Depth from soil line (cm) | Distance from trunk (m) | |||
|---|---|---|---|---|
| 0.9 m1 | 2.1 m | |||
| Biobarrier | Control | Biobarrier | Control | |
| Live oak | ||||
| 0-15 | 21% | 45% | 53% | 88% |
| 15-30 | 21% | 35% | 22% | 12% |
| 30-45 | 37% | 8% | 7% | 0 |
| 45-60 | 21% | 12% | 18% | 0 |
| Sycamore | ||||
| 0-15 | 15% | 46% | 52% | 84% |
| 15-30 | 23% | 26% | 16% | 8% |
| 30-45 | 37% | 17% | 12% | 8% |
| 45-60 | 25% | 11% | 20% | 0 |
↵1 This was 15 cm outside the Biobarrier.