Equations / Stem biomass
Stem biomass, Eucalyptus saligna young plantation, dbh only
Stem biomassEucalyptus saligna · MyrtaceaeEcuadorplantationRead from the original paper
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Equation
As printed (Table 2)
Ln(B) = −1.49 + 2.00∗Ln(dbh)
In this library's units, ready to compute (kg)
Stem biomass = exp(-1.49 + 2.0 * ln(D))D- Diameter at breast height (1.3 m), cm
Ln is the natural log as printed. Published without correction factor (Table 3 compares with and without CF; the authors give the model without CF, so none is applied). dbh in cm, biomass in kg/tree. Table 2 prints R2 and adjusted R2 in a way that does not reconcile for this component, so r2 is left out.
Source
doi:10.3390/ijpb16020039 · Open access · copy we read
the research involved 46 trees
These trees had a dbh between 5.9 and 21.0 cm and 5.4 to 14.8 m of total height (ht).
- Trees measured
- 46
- DBH range
- 5.9–21 cm
- Height range
- 5.4–14.8 m
- Method
- OLS on Ln(B) vs Ln(dbh); no correction factor applied
- Where
- Tunshi Experimental Station, ESPOCH, Chimborazo (Lower Montane thorny steppe)
- Last checked
- 2026-11-02
Calculate
14.42
Stem biomass (kg)
6.779
Carbon (kg), ×0.47
24.86
CO₂e (kg), ×44/12
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
Checks this equation passes
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 = 8 | 14.4 | 14.4 | Computed from the printed form hand-computed from the published form |
| D = 15 | 50.7 | 50.7 | Computed from the printed form hand-computed from the published form |
Related
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- Eucalyptus camaldulensis stem (wood + bark) biomass from D²H · Ounban et al. 2016 · DBH + Height
- Eucalyptus globulus stem dry weight to 10 cm top (Cuadro 2) · Prado Donoso & Alarcón Maya 1991 · DBH + Height
- Eucalyptus globulus stem dry weight to 4 cm top (Cuadro 2) · Prado Donoso & Alarcón Maya 1991 · DBH + Height
- Branch biomass, Eucalyptus saligna young plantation, dbh only · same paper · Branch biomass
- Leaf biomass, Eucalyptus saligna young plantation, dbh only · same paper · Foliage biomass
- Total aboveground biomass, Eucalyptus saligna young plantation, dbh only · same paper · Aboveground biomass