Tree Allometrics

Fagus sylvatica / Branch biomass

Beech saplings on dry sites, branch dry biomass including foliage from root-collar diameter (Table 2)

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

As printed (Table 2, BR Dry row)

BR Dry a 0.02 b 2.533 Adj-R² 0.77 N 20

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

Branch biomass = 0.02 * DRC^2.533
DRC
Root collar / stem base diameter, cm

Dry biomass in kg. Adjusted R2 as printed: 0.77. Saplings only; DRC measured at 5 cm above ground, sapling DRC range 1.1-4.1 cm. Branch biomass includes foliage.. Fitted on dry-site beech; the paper also gives fresh-biomass and log-transformed variants (not added).

Source
N 20
Trees measured · Table 2, BR Dry row
Trees measured
20
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
0.0559
Branch biomass (kg)
0.0263
Carbon (kg), ×0.47
0.0963
CO₂e (kg), ×44/12
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
DRC = 1.50.05590.0559Computed from the printed form
computed from the published coefficients
DRC = 2.50.2040.204Computed from the printed form
computed from the published coefficients
DRC = 3.50.4780.478Computed from the printed form
computed from the published coefficients

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