Equations / Aboveground biomass
Quercus obtusata: total aboveground biomass (sum of components)
Aboveground biomassQuercus obtusata Bonpl. · FagaceaeMexiconaturalRead from the original paper
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Equation
As printed (Table 9, Quercus obtusata)
Bt = ΣBi
In this library's units, ready to compute (kg)
Aboveground biomass = (exp(-3.53684) * D^2.043763 * H^0.759522) + (exp(-5.803952) * (D^2 * H)^1.224292) + (exp(-6.181035) * D^2.488617)D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Table 1 sample size and ranges for this species. Adjusted R2 (not stored): stem 0.86, branches 0.84, foliage 0.82, total 0.94 (Table 9). Total is the sum of the component equations, as the paper defines it.
Source
doi:10.21829/myb.2019.2521799 · Open access · copy we read
Bf = exp (– 3.53684) × Dn^2.043763 × At^0.759522
Br = exp (– 5.803952) × (Dn² × At)^1.224292
Bh = exp (– 6.181035) × Dn^2.488617
34
- Trees measured
- 34
- DBH range
- 6.2–37.6 cm
- Height range
- 4.85–14.2 m
- Method
- Additive system of component equations fitted simultaneously (iterated seemingly unrelated regression)
- Where
- Sierra de Santa Rosa, Guanajuato (bosques de encino)
- Last checked
- 2026-11-02
Calculate
Height from
70.21
Aboveground biomass (kg)
33
Carbon (kg), ×0.47
121
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 = 15.6, H = 7.7 | 70.2 | 70.2 | Computed from the printed form computed from the published form (Table 9) |
| D = 28.2, H = 11.4 | 389.6 | 389.6 | Computed from the printed form computed from the published form (Table 9) |
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