Dalbergia arbutifolia / Aboveground biomass
Dry miombo, total AGB, Dalbergia arbutifolia, D and H
As printed (Table 1, total biomass, model 3)
In this library's units, ready to compute (kg)
Aboveground biomass = 1.0113 * exp(-2.7097 + 1.99 * ln(D) + 0.9035 * ln(H))D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
ln-ln OLS (species models) or linear mixed model with species random effect (group models); total aboveground biomass is stump + stem and branches + twigs and leaves, so foliage is included. The paper states CF = exp(RMSE²/2) and that it was applied to predictions; the CF value (1.0113) is not printed and is computed here from the printed RMSE (0.15) by that stated formula, and applied in both forms. The R² shown for group models is the likelihood-ratio R² named in the Table 2 note; for species models it is adjusted R².
doi:10.1155/2014/531256 · Open access · copy we read
CF = exp(RMSE2/2), which was applied to the predicted values of volume and biomass
Y is volume (m3) or biomass (kg); Dbh is diameter at breast height (cm); ht is total height (m); and wd is wood density (kg m−3).
The minimum and maximum sizes of sample trees/shrubs were 1.4 cm and 62.0 cm in diameter at breast height
- Trees measured
- 37
- DBH range
- 1.8–21.5 cm
- Height range
- 2.6–8.8 m
- R²
- 0.99
- Correction factor
- 1.0113 (applied)
- Method
- OLS on ln-transformed data
- Where
- Gangalamtumba Village Land Forest Reserve, Iringa, Tanzania (dry miombo woodland)
- Last checked
- 2026-11-02
Outside the data this model was fitted on: height above the fitted 8.8 m. Results may be unreliable.
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 = 20, H = 10 | 209 | 209 | Computed from the printed form hand-computed from the published form |
| D = 40, H = 14 | 1,126 | 1,126 | Computed from the printed form hand-computed from the published form |
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