Tree Allometrics

Pinus radiata / Aboveground biomass

Radiata pine total AGB, weighted arithmetic model Eq. 13

Aboveground biomassPinus radiata · PinaceaeNew ZealandplantationRead from the original paper
Photo of Pinus radiata
© Forest and Kim Starr · CC BY · iNaturalist
Equation

As printed (Section 2.2, Eq. 13)

AGB = β0 Dβ1 (13)

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

Aboveground biomass = 0.1291 * D^2.2718
D
Diameter at breast height (1.3 m), cm

D in cm, H in m, AGB in kg. Fitted directly on the arithmetic scale, so no correction factor. Fit ranges are the pooled data (Table I overall). Eq. 18 under-predicts large trees according to the paper (Section 3.2).

Source
0.1291 | 2.2718
Equation · Table II, row Eq. 13 (parameter estimates)
biomass measurements for 637 individual radiata pine trees from 13 different studies
Trees measured · Section 2.1
0.88
R² · Table II, R2 column, Eq. 13
Trees measured
637
DBH range
0.7–80.6 cm
Height range
up to 42.1 m
R²
0.88
Method
weighted (varPower) mixed-effects model on the arithmetic scale; no back-transformation needed
Where
New Zealand (13 studies, mainly North Island)
Last checked
2026-11-02
Calculate
24.1
Aboveground biomass (kg)
11.3
Carbon (kg), ×0.47
41.6
CO₂e (kg), ×44/12
Fitted DBH range0100200300400500600510152025303540DBH (cm)Aboveground biomass (kg)Aboveground 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 = 1024.124.1Computed from the printed form
hand-computed from the published form
D = 25194194Computed from the printed form
hand-computed from the published form
D = 50935935Computed from the printed form
hand-computed from the published form

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