Tree Allometrics

Equations / Stem biomass

Olea europaea var. sylvestris stem with bark biomass (Table 2)

Stem biomassOlea europaea var. sylvestris · OleaceaeSpainmixedRead from the original paper
Photo of Olea europaea var. sylvestris
viridian · CC0 · iNaturalist
Equation

As printed (Table 2, Olea europaea var. sylvestris, Stem row)

Ws = 0.0114 · d² · h

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

Stem biomass = 0.0114 * D^2 * H
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

Stem with bark (commercial volume, up to a top diameter of 7 cm); fitted jointly with the branch equations by SUR to keep components additive. Stand type is not stated per species in the paper. Branch equations for this species are not added.

Source
Olea europaea var. sylvestris ... 17
Trees measured · Table 1, Olea europaea var. sylvestris row, aboveground biomass n column
Olea europaea var. sylvestris 10.0 40.5
Smallest DBH · Table 1, diameter min/max (all sample trees of the species)
Trees measured
17
DBH range
10–40.5 cm
Height range
4.9–11 m
Method
seemingly unrelated regression with weighting
Where
Spain (sample zones per species, Figure 1)
Last checked
2026-11-02
Calculate
Height from
45.6
Stem biomass (kg)
21.43
Carbon (kg), ×0.47
78.58
CO₂e (kg), ×44/12
Fitted DBH range050100150200510152025303540DBH (cm)Stem biomass (kg)Stem 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 = 20, H = 1045.645.6Computed from the printed form
computed from the Table 2 coefficients
D = 35, H = 15209.5209.5Computed from the printed form
computed from the Table 2 coefficients

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