Figure 1

Figure 2

Figure 3

Figure 4

Description of tree samples from young S_ mahagoni trees_
| No | Age (year) | Average of DBH (cm) | Average of total merchantable height (m) |
|---|---|---|---|
| 1 | 1 | 1.08 ± 0.28 a | 0.54 ± 0.10 |
| 2 | 2 | 1.99 ± 0.32 | 1.72 ± 0.16 |
| 3 | 3 | 4.46 ± 0.10 | 4.25 ± 0.10 |
| 4 | 4 | 6.13 ± 1.12 | 4.80 ± 0.77 |
| 5 | 5 | 8.05 ± 1.17 | 6.60 ± 1.20 |
The interaction of tree age with an axial position on the extractive content of S_ mahagoni wood_
| Solvent | 1 year | 2 years | 3 years | |||
|---|---|---|---|---|---|---|
| Bottom | Top | Bottom | Top | Bottom | Top | |
| Sapwood | Sapwood | Sapwood | Sapwood | Sapwood | Sapwood | |
| n-Hexane | 0.71 ± 0.14 a | 1.09 ± 0.24 bc | 1.26 ± 0.08 bc | 1.28 ± 0.20 bcd | 1.41 ± 0.41 cd | 0.96 ± 0.13 ab |
| Methanol | 4.30 ± 0.85 bcde | 7.48 ± 2.34 f | 4.48 ± 0.48 abcde | 4.36 ± 1.04 cde | 3.72 ± 1.09 abcd | 2.57 ± 0.98 abc |
| Hot water | 2.09 ± 0.70 bc | 2.09 ± 0.50 bc | 3.57 ± 1.19 e | 2.22 ± 0.36 bc | 5.21 ± 0.65 f | 1.01 ± 0.20 a |
| Total | 7.10 ± 1.23 bc | 10.7 ± 2.27 de | 9.31 ± 1.25 cde | 7.86 ± 0.69 cd | 10.3 ± 1.59 de | 4.54 ± 0.95 ab |
Two-way ANOVA analysis for extractive, TPC, and TSP contents of S_ mahagoni wood_
| Source of variation | df | Parameters | |||||
|---|---|---|---|---|---|---|---|
| n-Hexane | Methanol | Hot water | Total Extractive | TPC | TSP | ||
| Tree age (T) | 10 | *** | *** | ** | *** | *** | ** |
| Axial (A) | 1 | *** | n.s | *** | *** | *** | *** |
| T × A | 10 | *** | ** | *** | *** | ** | *** |
| Error | 46 | ||||||
| Total | 67 | ||||||
