Equations / Aboveground biomass
Campo-Ma'an AGB from DBH and wood density (Table 3, model 4)
As printed (Table 3, Total biomass, model 4)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-1.9644 + 2.3382 * ln(D) + 0.3579 * ln(rho))D- Diameter at breast height (1.3 m), cm
rho- Wood density (oven-dry mass / green volume), g/cm³
Wood density in g/cm3 (the paper reports a mean of 0.64 g cm-3 for the site). The Greek letter for density is lost in the PDF text layer; read as rho from the model list (Eq. 9). 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 0.325, Adj. R2 0.9575, D (cm) 1–79
- Trees measured
- 71
- DBH range
- 1–79 cm
- R²
- 0.9575
- Residual SE
- 0.325
- 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, rho = 0.64 | 339.9 | 339.9 | Computed from the printed form hand-computed from the published form |
Related
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