Means (standard errors in parentheses) for stress (σ) and stress ratio (σ/MOR).z
| Calculation | n | σ (kPa) | Stress ratio |
|---|---|---|---|
| MOR | 26 | 69948 (764) a | N/A |
| Ellipse (IB) | 26 | 50094 (1561) b | 0.72 (0.036) a |
| Ellipse (OB) | 16 | 38603 (1525) c | 0.55 (0.024) b |
| Circle (OB) | 26 | 28067 (2405) d | 0.40 (0.035) c |
↵zThe modulus of rupture (MOR) comes from wood sample tests. Stress calculations were made considering the branch cross-section as either an ellipse or a circle (see equations 1 and 2, respectively) and measuring branch dimensions inside (IB) or outside (OB) bark. Means down a column followed by the same letter are not significantly different at P = 0.01 (Tukey highly significant difference).