Equations / Aboveground biomass
Miombo mixed-species AGB from DBH, Bayesian (Model 1)
As printed (Table 4 caption)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(-2.284 + 2.3 * ln(D))D- Diameter at breast height (1.3 m), cm
Recommended by the authors: the Bayesian DBH-only power law (lowest DIC, 51.04, and MAPE 27.20%). The paper says the AGB is the "total biomass of aboveground woody parts"; leaves were weighed separately, so foliage is flagged as excluded. No correction factor is stated for the back-transform, so none is applied. Stand is a mix of woodland and land-use systems. The Table 4 caption prints AGB = 0.102 * DBH^2.242, but 2.242 is the lower credible bound in the table body, whose point estimates (intercept −2.284, slope 2.300) are used here. AGB is stem + branches + twigs, and twigs include leaves (Section 2.3, Appendix I).
doi:10.3390/f7020013 · Open access · copy we read
A total of 88 trees ranging in DBH from 5.1 to 105 cm were harvested
total biomass of aboveground woody parts
Model 1: Intercept −2.284; lnDBH 2.300 (2.242, 2.438)
- Trees measured
- 88
- DBH range
- 5.1–105 cm
- Method
- Hierarchical Bayesian power-law regression (trees nested within sites)
- Where
- Kasungu, Salima and Neno districts, Malawi
- Last checked
- 2026-11-02
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 | 100 | 100 | Computed from the printed form computed from the Table 4 body coefficients |
| D = 60 | 1,253 | 1,253 | Computed from the printed form computed from the Table 4 body coefficients |
Related
- Miombo mixed-species AGB from DBH, OLS (Model 2) · Kuyah et al. 2016 · DBH
- Miombo mixed-species AGB from DBH, OLS (Model 2) · same paper · Aboveground biomass