Table 1.

Mean ± s.d. values of wood reduction for the extreme bands and the centre band partition.

	n	mean ± s.d. (g) of LB	mean ± s.d. (g) of UB	mean ratio UB/LB
extreme bands
density, δ = x1	20	0.051 ± 0.06	0.220 ± 0.309	4.31
moisture, mRH = x2	20	0.074 ± 0.162	0.051 ± 0.057	1.45
early wood, I = x3	19	0.043 ± 0.041	0.113 ± 0.130	2.63
frequency, f1 = x4	20	0.071 ± 0.088	0.109 ± 0.184	1.54
damping, ξ1 = x5	20	0.039 ± 0.039	0.088 ± 0.137	2.26
centre bands
density, δ = x1	22	0.025 ± 0.027	0.072 ± 0.147	2.88
moisture, mRH = x2	15	0.058 ± 0.056	0.077 ± 0.121	0.97
early wood, I = x3	20	0.053 ± 0.059	0.074 ± 0.119	1.39
frequency, f1 = x4	16	0.071 ± 0.066	0.086 ± 0.139	1.21
damping, ξ1 = x5	16	0.052 ± 0.071	0.098 ± 0.088	1.37