Tree Allometrics

Fagus sylvatica / Stem biomass

Beech on dry sites, stem with bark dry biomass from DBH (Table 3)

Stem biomassFagus sylvatica · FagaceaeGermany, SwitzerlandnaturalRead from the original paper
Photo of Fagus sylvatica
© Rebecca Gimenez Husted · CC BY · iNaturalist
Equation

As printed (Table 3, ST Dry row)

ST Dry a 0.100 b 2.343 Adj-R² 0.96 N 66

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

Stem biomass = 0.1 * D^2.343
D
Diameter at breast height (1.3 m), cm

Dry biomass in kg. Adjusted R2 as printed: 0.96. Stem with bark.. Fitted on dry-site beech; the paper also gives fresh-biomass and log-transformed variants (not added).

Source
N 66
Trees measured · Table 3, ST Dry row
The range of the DRC and DBH of 86 plants were 1.1-4.1 cm and 2-18 cm, respectively.
Smallest DBH · Materials and methods, Sampling design
Trees measured
66
DBH range
2–18 cm
Method
power function regression, biomass = a * diameter^b (dry mass)
Where
Five abandoned oak-coppice stands on dry south-facing sites, southern Germany and northern Switzerland
Last checked
2026-11-02
Calculate
4.34
Stem biomass (kg)
2.04
Carbon (kg), ×0.47
7.48
CO₂e (kg), ×44/12
Fitted DBH range0100200300400500600510152025303540DBH (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 = 54.344.34Computed from the printed form
computed from the published coefficients
D = 102222Computed from the printed form
computed from the published coefficients
D = 155757Computed from the printed form
computed from the published coefficients

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