Equations / Branch biomass
Eucalyptus globulus branch (>4 cm) dry weight (Cuadro 2)
© Forest and Kim Starr · CC BY · iNaturalistAs printed (Cuadro 2, RAMAS (> 4cm) row, p. 64)
In this library's units, ready to compute (kg)
Branch biomass = 17.912236 - 3.17988 * D + 0.00316 * (D^2 * H)D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Branches thicker than 4 cm only (twigs and leaves are separate components). Very imprecise: the authors report a 89.7% mean square error and advise taking branches by difference. Trees from three unmanaged 20-25 year old coppice-origin (monte alto) stands. The paper does not print DBH or height ranges of the fitted sample, only a table of diameter classes, so none is given. H is read as total height (HTOT): the paper's own stand-table comparison feeds DAP and HT into these functions. No correction factor is stated for the log models, so none applies here. Not additive with the other component functions, as the authors note.
doi:10.52904/0718-4646.1991.147 · Open access · copy we read
se utilizó una muestra de 41 árboles extraídos de tres parcelas
RAMAS (> 4cm) ... 0,73
- Trees measured
- 41
- R²
- 0.73
- Method
- stepwise linear regression on dry weight (Cuadro 2)
- Where
- Coastal zone of Valparaíso Region (Longotoma, Peñuelas, Santa Marta), central Chile
- Last checked
- 2026-11-02
The model gives a negative value for this tree, so it does not apply here.
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 = 20 | -20.4 | -20.4 | Computed from the printed form hand-computed from the Cuadro 2 form |
| D = 35, H = 25 | 3.39 | 3.39 | Computed from the printed form hand-computed from the Cuadro 2 form |
Related
- Branch biomass, Eucalyptus saligna young plantation, dbh only · Ramos-Veintimilla et al. 2025 · DBH
- Eucalyptus globulus stem dry weight to 10 cm top (Cuadro 2) · same paper · Stem biomass
- Eucalyptus globulus stem dry weight to 4 cm top (Cuadro 2) · same paper · Stem biomass
- Eucalyptus globulus total dry weight from D (Cuadro 2) · same paper · Aboveground biomass