Average measurements of sound trees by different nondestructive techniques.
| No. | DF (m Hz) | R (%) | C (kgf/cm2) | D (kg/m3) |
|---|---|---|---|---|
| Japanese cedar (in this study) | 284.6 (28.7) | 18.5 (7.0) | 186.2 (28.4) | 500.4 (93.0) |
| Norfolk island pine (Lin et al. 2015) | 381.3 (17.8) | 32.4 (5.6) | 248.9 (31.4) | 533.4 (29.2) |
| Hoop pine (Lin et al. 2016) | 327.6 (13.2) | 39.7 (8.4) | 256.8 (31.4) | 578.0 (46.2) |
Notes: DF = lateral impact vibration performance; R = drilling resistance value; C = crushing strength; D = air-dried density; parentheses ( ) indicate standard deviation.