Equations / Aboveground biomass
Campo-Ma'an AGB from DBH (Table 3, model 2)
As printed (Table 3, Total biomass, model 2)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-2.1079 + 2.3278 * ln(D))D- Diameter at breast height (1.3 m), cm
Mixed-species site equation from 71 felled trees; the authors state that model 2 and model 1 are good predictors with DBH only. Coefficients are used as printed; the paper does not state that the log-scale back-transformation correction factor is included, so none is applied. Reported R² is the adjusted R². Table 3 fit on 71 trees (7 of its equations captured). The Discussion (p. 1880) refits on 91 trees and recommends slightly different coefficients, printed without n, RSE or R²; this file keeps the Table 3 fit. The paper notes only three of the 71 trees were above 10 cm.
doi:10.1016/j.foreco.2010.08.034 · Paywalled · copy we read
N 71, RSE 0.330, Adj. R2 0.9562, D (cm) 1–79
- Trees measured
- 71
- DBH range
- 1–79 cm
- R²
- 0.9562
- Residual SE
- 0.33
- Method
- log-log regression
- Where
- Campo-Ma'an, southern Cameroon
- Last checked
- 2026-11-01
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 = 30 | 333 | 333 | Computed from the printed form hand-computed from the published form |
| D = 10 | 25.8 | 25.8 | Computed from the printed form hand-computed from the published form |
Related
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