Equations / Aboveground biomass
Dipterocarp forests Vietnam, mixed-species AGB from D and wood density (M3)
Aboveground biomassMixed species, dipterocarp forest (26 species)VietnamnaturalRead from the original paper
Many species, no single photo
Equation
As printed (Table 4)
M3 DBH, WD AGB = a × DBHb × WDc; a 0.07126, b 2.60940, c 0.59275
In this library's units, ready to compute (kg)
Aboveground biomass = 0.07126 * D^2.6094 * rho^0.59275D- Diameter at breast height (1.3 m), cm
rho- Wood density (oven-dry mass / green volume), g/cm³
AGB is the sum of stem, branch and foliage dry mass. Fitted on the whole dataset with the fixed-effects model; the random ecoregion effect was not retained. No correction factor is stated. The standard error printed for c in Table 4 equals the estimate itself and looks like a typo; it is not used.
Source
doi:10.3390/f7080180 · Open access · copy we read
A total of 222 trees were destructively sampled
Min 3.4 / Max 48.8 (DBH, Mixed-Species)
- Trees measured
- 222
- DBH range
- 3.4–48.8 cm
- Height range
- 2.5–23.5 m
- Method
- nonlinear weighted least squares (power variance function)
- Where
- Dipterocarp forests, Central Highlands and Southeast ecoregions, Vietnam
- Last checked
- 2026-11-02
Calculate
20.34
Aboveground biomass (kg)
9.56
Carbon (kg), ×0.47
35.05
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
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 = 0.55 | 20.3 | 20.3 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 20, rho = 0.65 | 137 | 137 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 40, rho = 0.75 | 910.3 | 910.3 | Computed from the printed form computed from the published form (coefficients as printed) |
Related
- Dipterocarp forests Vietnam, mixed-species AGB from D (M1) · Huy et al. 2016 · DBH
- Dipterocarp forests Vietnam, mixed-species AGB from D and H (M2) · Huy et al. 2016 · DBH + Height
- Dipterocarp forests Vietnam, mixed-species AGB from D, H and wood density (M4, Eq. 17) · Huy et al. 2016 · DBH + Height + Wood density
- Dipterocarpus genus, Vietnam, AGB from D (D1, Eq. 18) · same paper · Aboveground biomass
- Dipterocarp forests Vietnam, mixed-species AGB from D (M1) · same paper · Aboveground biomass
- Dipterocarp forests Vietnam, mixed-species AGB from D and H (M2) · same paper · Aboveground biomass
- Dipterocarp forests Vietnam, mixed-species AGB from D, H and wood density (M4, Eq. 17) · same paper · Aboveground biomass
- Shorea genus, Vietnam, AGB from D (S1, Eq. 19) · same paper · Aboveground biomass