Equations / Aboveground biomass, without leaves
Malawi miombo AGB, DBH and wood density (Model 3)
Aboveground biomass, without leavesMiombo woodland treesMalawinaturalRead from the original paper
Many species, no single photo
Equation
As printed (Table 5)
3 74 0.290457 × dbh^2.283998 × ρ^0.443619 0.94
In this library's units, ready to compute (kg)
Aboveground biomass, without leaves = 0.290457 * D^2.283998 * rho^0.443619D- Diameter at breast height (1.3 m), cm
rho- Wood density (oven-dry mass / green volume), g/cm³
Fitted by weighted nonlinear regression, so no back-transform correction factor. Leaves were excluded from the biomass. ρ is species-mean wood specific gravity from the global wood density database.
Source
doi:10.3390/f7020038 · Open access · copy we read
All 74 33.4 5.3 111.2 21.8 11.6 3.0 25.0 4.9
- Trees measured
- 74
- DBH range
- 5.3–111.2 cm
- Height range
- 3–25 m
- R²
- 0.94
- Method
- weighted nonlinear regression (SAS PROC MODEL); r2 is pseudo-R2
- Where
- Miombo woodlands at Mtangatanga, Kongwe, Tsamba and Mua-livulezi, Malawi
- Last checked
- 2026-11-01
Calculate
232.2
Aboveground biomass, without leaves (kg)
109.1
Carbon (kg), ×0.47
400.2
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 = 20, rho = 0.7 | 232.2 | 232.2 | Computed from the printed form hand-computed from the published form |
| D = 60, rho = 0.7 | 2,855 | 2,855 | Computed from the printed form hand-computed from the published form |
Related
- Malawi miombo AGB, DBH only (Model 1) · Kachamba et al. 2016 · DBH
- Malawi miombo AGB, DBH and height (Model 2, best AIC) · Kachamba et al. 2016 · DBH + Height
- Tanzania miombo AGB, DBH only · Mugasha et al. 2013 · DBH
- Tanzania miombo AGB, DBH and height · Mugasha et al. 2013 · DBH + Height
- Miombo stem biomass (trunk and branches), DBH only · Ryan et al. 2011 · DBH
- Malawi miombo AGB, DBH only (Model 1) · same paper · Aboveground biomass, without leaves
- Malawi miombo AGB, DBH and height (Model 2, best AIC) · same paper · Aboveground biomass, without leaves
- Malawi miombo belowground biomass, DBH only (Model 1) · same paper · Root biomass