Number of roots detected by GPR and the predicted depth of roots in each scan at depths of 200, 400, and 800 mm.
| Depth of Roots (mm) | Scan number | Number of roots | Mean predicted depth of roots (mm) |
|---|---|---|---|
| 200 | 1 | 9 | 169 |
| 2 | 9 | 153 | |
| 3 | 10 | 141 | |
| 400 | 4 | 9 | 298 |
| 5 | 8 | 274 | |
| 6 | 10 | 263 | |
| 800 | 7 | 11 | 395 |
| 8 | 11 | 308 | |
| 9 | 15 | 334 |