Tree Allometrics

Grevillea robusta / Aboveground biomass

Grevillea robusta on farms, power model in DBH

Aboveground biomassGrevillea robusta · ProteaceaeKenyaagroforestryRead from the original paper
Photo of Grevillea robusta
© stinger · CC BY · iNaturalist
Equation

As printed (Table 6 (power model))

AGB=1.384DBH1.665

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

Aboveground biomass = 1.384 * D^1.665
D
Diameter at breast height (1.3 m), cm

Table 6 lists it with R2 0.98, SEE 0.99 and MRE 3.2; the authors selected the polynomial instead (Table 7). Safer than the polynomial for small trees.

Source
Trees measured
33
DBH range
1.5–29.8 cm
Height range
3.6–24.8 m
R²
0.98
Method
power regression
Where
Maragua subcounty, Murang'a County, central Kenya (farms)
Last checked
2026-11-01
Calculate
126
Aboveground biomass (kg)
59.1
Carbon (kg), ×0.47
217
CO₂e (kg), ×44/12
Fitted DBH range0100200300400500600700510152025303540DBH (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 = 15126126Computed from the printed form
hand-computed from the published form
D = 28355355Computed from the printed form
hand-computed from the published form

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