Equations / Root biomass
Malawi miombo belowground biomass, DBH only (Model 1)
Root biomassMiombo woodland treesMalawinaturalRead from the original paper
Many species, no single photo
Equation
As printed (Table 5)
Belowground 1 41 0.284615 × dbh^1.992658 0.94
In this library's units, ready to compute (kg)
Root biomass = 0.284615 * D^1.992658D- Diameter at breast height (1.3 m), cm
Fitted by weighted nonlinear regression; no correction factor.
Source
doi:10.3390/f7020038 · Open access · copy we read
- Trees measured
- 41
- 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
111
Root biomass (kg)
52.3
Carbon (kg), ×0.47
192
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 | 111 | 111 | Computed from the printed form hand-computed from the published form |
Related
- Miombo coarse root biomass, 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 AGB, DBH and wood density (Model 3) · same paper · Aboveground biomass, without leaves