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Official Journal of the Japan Wood Research Society

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Table 6 Variance components for mechanical properties of Melia azedarach

From: Within-stem variations in mechanical properties of Melia azedarach planted in northern Vietnam

Source of variation df MOR MOE E d
p value Var (%) p value Var (%) p value Var (%)
Site (S) 1 0.001 25.43 0.001 26.78 0.001 29.15
Tree/site (T/S) 4 0.862 0.55 0.013 5.12 0.001 6.78
Height level (L) 4 0.717 0.91 0.103 3.18 0.432 1.55
L × S 4 0.974 0.21 0.618 1.08 0.001 0.57
L × T/S 16 0.996 2.24 0.298 7.08 0.843 3.90
Radial position (P) 2 0.001 55.31 0.001 30.93 0.028 37.53
P × S 2 0.001 2.09 0.209 0.76 0.199 0.61
P × T/S 8 0.031 1.62 0.400 1.80 0.001 4.39
P × L 8 0.150 1.19 0.869 1.50 0.923 0.61
P × L × S 8 0.933 0.29 0.864 0.90 0.766 0.95
P × L × T/S 32 0.511 2.62 0.483 5.47 0.927 2.57
Residuals 90   7.53   15.4   11.40
  1. MOR modulus of rupture, MOE modulus of elasticity, Ed dynamic modulus of elasticity, df degrees of freedom, Var variance (%)