Equations / Aboveground biomass
S. teysmaniana peat swamp, ln(AGB) on DBH and wood density
As printed (Tabel 3, row 4, p. 8)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-1.03 + 2.08 * ln(D) - 0.51 * ln(rho))D- Diameter at breast height (1.3 m), cm
rho- Wood density (oven-dry mass / green volume), g/cm³
Table 1 gives DBH 7.30-29.20 cm and total height 8.20-20.92 m (n=20); the text says the models apply to 5-40 cm trees. R2 printed as 0,99 (rounded). The paper states no back-transform correction factor, so none is applied. Biomass is total aboveground (stem, branches, twigs, leaves). WD is wood density in gr/cm3 (oven-dry weight over saturated volume). Table 1 lists only 5 wood-density observations although Tabel 3 prints n=20.
doi:10.20886/jsek.2012.9.1.1-11 · Open access · copy we read
n=20
0,99
- Trees measured
- 20
- DBH range
- 7.3–29.2 cm
- Height range
- 8.2–20.92 m
- R²
- 0.99
- Method
- log-log regression
- Where
- Peat swamp forest, Barito Selatan, Central Kalimantan
- Last checked
- 2026-11-02
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
On every build, the library's form and the paper's own form (in its units) must both give these values within 1%.
| Inputs | Expected | We get | From |
|---|---|---|---|
| D = 10, rho = 0.5 | 61.1 | 61.1 | Computed from the printed form hand-computed from the published form |
| D = 25, rho = 0.6 | 374.6 | 374.6 | Computed from the printed form hand-computed from the published form |
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- S. teysmaniana peat swamp, ln(AGB) on DBH and total height · Akbar 2012 · DBH + Height
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- Shorea genus, Vietnam, AGB from D (S1, Eq. 19) · Huy et al. 2016 · DBH
- S. teysmaniana peat swamp, ln(AGB) on DBH and total height · same paper · Aboveground biomass
- S. teysmaniana peat swamp, ln(AGB) on DBH · same paper · Aboveground biomass