Tree Allometrics

Quercus sideroxyla / Branch biomass

Quercus sideroxyla: branch biomass

Branch biomassQuercus sideroxyla Bonpl. · FagaceaeMexiconaturalRead from the original paper
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Equation

As printed (Table 9, Quercus sideroxyla)

Br = exp (– 4.317865) × Dn^3.305381 × At^–0.64785

In this library's units, ready to compute (kg)

Branch biomass = exp(-4.317865) * D^3.305381 * H^(-0.64785)
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 0.97, branches 0.96, foliage 0.91, total 0.99 (Table 9).

Source
33
Trees measured · Table 1, Q. sideroxyla
Trees measured
33
DBH range
4.8–40.5 cm
Height range
3.55–15.7 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
31.9
Branch biomass (kg)
15
Carbon (kg), ×0.47
55
CO₂e (kg), ×44/12
Fitted DBH range0100200300400500600700800510152025303540DBH (cm)Branch biomass (kg)Branch biomass

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%.

InputsExpectedWe getFrom
D = 15.5, H = 7.231.931.9Computed from the printed form
computed from the published form (Table 9)
D = 29.8, H = 12.1198198Computed from the printed form
computed from the published form (Table 9)

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