Table 4 Statistics of the waste to roundwood ratio by tree species
Species | Volume of merchantable roundwood (m3) | Volume of branch (m3) | Volume of twig (m3) | Waste to roundwood ratio | ||
|---|---|---|---|---|---|---|
RB-L (%) | RT-L (%) | Firewood to roundwood (%) | ||||
Sengon, Mean | 4.1 | 2.3 | 1.2 | 65.7 | 47.2 | 119.7 |
Minimum | 1.0 | 0.0 | 0.0 | 0.0 | 0.0 | 12.5 |
Maximum | 21.0 | 14.0 | 4.0 | 333.3 | 200.0 | 466.7 |
Standard deviation | 4.4 | 2.6 | 1.0 | 74.9 | 42.0 | 104.1 |
Mahogany, Mean | 3.1 | 2.7 | 1.6 | 87.8 | 58.3 | 156.6 |
Minimum | 0.5 | 0.4 | 0.0 | 23.3 | 0.0 | 46.7 |
Maximum | 12.0 | 11.2 | 9.0 | 280.0 | 250.0 | 350.0 |
Standard deviation | 2.4 | 2.6 | 1.9 | 59.3 | 50.0 | 88.6 |
Teak, Mean | 4.1 | 2.1 | 1.9 | 51.6 | 38.1 | 93.1 |
Minimum | 1.0 | 0.4 | 0.3 | 26.3 | 17.5 | 46.7 |
Maximum | 12.0 | 6.0 | 6.0 | 120.0 | 92.3 | 183.8 |
Standard deviation | 3.5 | 1.8 | 2.0 | 30.0 | 24.7 | 51.7 |
Mixed species, Mean | 3.3 | 2.5 | 1.1 | 82.9 | 67.2 | 165.5 |
Minimum | 0.5 | 0.3 | 0.1 | 14.0 | 7.0 | 21.0 |
Maximum | 50.0 | 12.0 | 8.4 | 400.0 | 200.0 | 500.0 |
Standard deviation | 7.8 | 4.3 | 1.5 | 84.0 | 56.6 | 133.3 |