Coniferous species injected in the experiments.
| Common names | Species | Average trunk diameter (cm/in.) |
|---|---|---|
| Resinous | ||
| Stone pine | Pinus pinea L. | 41.7 (16.7) |
| Cluster pine | Pinus pinaster Ait. | 26.5 (10.6) |
| Aleppo pine | Pinus halepensis Mill | 20.5 (8.2) |
| Canary Island pine | Pinus canariensis Sweet ex K. Spreng | 18.7 (7.5) |
| Nonresinous | ||
| Italian cypress | Cupressus sempervirens L. | 19.5 (7.8) |
| Spanish fir | Abies pinsapo Boiss. | 20.6 (8.2) |
| Deodar cedar | Cedrus deodara (D. Don) G. Don | 28.3 (11.3) |