| Scots pine | Norway spruce | ||
| Surface | Surface | ||
| Tangential | Radial | Tangential | Radial |
Number of specimens | 82 | 84 | 31 | 31 |
Specific gravity (SG) | 0.603 (0.073) | 0.621 (0.074) | 0.452 (0.060) | 0.448 (0.046) |
Annual rings/17 mm | 15.3 (9.0) | 12.7 (7.2) | 7.6 (3.0) | 7.3 (3.5) |
Ring angle, ˚ | 13 (11) | 84 (14) | 2 (2) | 79 (11) |
Heartwood proportion, % | 50 (46) | 72 (39) | Not determined | Not determined |