Tree Allometrics

Fagus sylvatica / Aboveground biomass

Aboveground biomass from diameter and height (Table III)

Aboveground biomassFagus sylvaticaNetherlandsRead from the original paperPeer-reviewed source
Photo of Fagus sylvatica
© Rebecca Gimenez Husted · CC BY · iNaturalist
Equation

As printed (Table III, model below table and Total row, p. 43 (rendered page-06).)

Y = c₁*dbh^c₂*h^c₃; c₁ = 0.0306, c₂ = 2.347, c₃ = 0.590

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

Aboveground biomass = 0.0306 * D^2.347 * H^0.590
D
Diameter at breast height (1.3 m), cm
H
Total tree height, m

DBH is measured at 1.30 m; h is measured tree height. Stem dry mass was estimated from stem volume using a basic density of 550 kg/m³. The author reports that adding height increased R². R² is adjusted for degrees of freedom.

Source
Total 0.0306 0.0119 2.347 0.096 0.590 0.183 0.991
Equation · Table III, p. 43 (rendered page)
The models are of the form Y = c₁*dbhᶜ²*hᶜ³.
Equation · Table III, p. 43 (rendered page)
total aboveground biomass
Output · Data analysis, p. 42
Nonlinear models between tree biomass amounts or leaf area (Y: in kg or m²) and dbh (in cm) and tree height (h: in m).
Units · Table III, p. 43 (rendered page)
The number of observations is 38.
Trees measured · Table III, p. 43 (rendered page)
Total 0.0306 0.0119 2.347 0.096 0.590 0.183 0.991
R² · Table III, p. 43 (rendered page)
In the case of nonlinear regression analysis the model was fitted directly by nonlinear least squares.
method · Data analysis, p. 42
beech (Fagus sylvatica L)
Taxon · Title, p. 39
centre of the Netherlands.
Where · Data collection, p. 40
Trees measured
38
R²
0.991
Method
nonlinear least squares
Where
Forest area in the centre of the Netherlands
Last checked
2026-11-05
Calculate
Height from
83.6
Aboveground biomass (kg)
39.3
Carbon (kg), ×0.47
144
CO₂e (kg), ×44/12

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, H = 1483.683.6Computed from the printed form
Computed from Table III.

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