Tree Allometrics

Equations / Aboveground biomass

Juniperus procera AGB from DBH (M17)

Aboveground biomassJuniperus procera · CupressaceaeEthiopianaturalRead from the original paper
Photo of Juniperus procera
© avocat · CC BY · iNaturalist
Equation

As printed (Table 4 (a, b, adj-R2, rRMSE, rBias, AIC))

M17 Juniperus procera 23 AGB = a × DBHb 0.161 2.199 0.966 74.1 −10.7 5.6

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

Aboveground biomass = 0.161 * D^2.199
D
Diameter at breast height (1.3 m), cm

Best species-specific model for Juniperus procera with a single diameter predictor. Adjusted R2 0.966. The fits were done on ln-transformed data and the paper says predictions were back-transformed with a correction factor (CF from RSE) for its error statistics, but it does not print the CF or say whether the tabulated a already includes it; no cf is entered. Adjusted R2 is given in the notes, not fit.r2, because it is adjusted.

Source
Juniperus procera 23 21.2 5.2–51.0 18.1 4.2–45.2
Smallest DBH · Table 1 (n, DSH mean and range, DBH mean and range)
Trees measured
23
DBH range
4.2–45.2 cm
Method
Power function fitted on ln-transformed data
Where
Desa'a dry Afromontane forest, Tigray
Last checked
2026-11-02
Calculate
25.46
Aboveground biomass (kg)
11.97
Carbon (kg), ×0.47
43.87
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 = 1025.525.5Computed from the printed form
computed from the published form
D = 25190.9190.9Computed from the printed form
computed from the published form

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