Tree Allometrics

Fagus sylvatica / Aboveground biomass

Beech saplings on dry sites, total aboveground dry biomass from root-collar diameter (Table 2)

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

As printed (Table 2, AB Dry row)

AB Dry a 0.04 b 2.408 Adj-R² 0.83 N 20

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

Aboveground biomass = 0.04 * DRC^2.408
DRC
Root collar / stem base diameter, cm

Dry biomass in kg. Adjusted R2 as printed: 0.83. Saplings only; DRC measured at 5 cm above ground, sapling DRC range 1.1-4.1 cm. Includes leaves.. Fitted on dry-site beech; the paper also gives fresh-biomass and log-transformed variants (not added).

Source
N 20
Trees measured · Table 2, AB 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
0.106
Aboveground biomass (kg)
0.0499
Carbon (kg), ×0.47
0.183
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 = 1.50.1060.106Computed from the printed form
computed from the published coefficients
DRC = 2.50.3630.363Computed from the printed form
computed from the published coefficients
DRC = 3.50.8170.817Computed from the printed form
computed from the published coefficients

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