Tree Allometrics

Jatropha mollissima / Aboveground biomass

Jatropha mollissima, caatinga, DBH

Aboveground biomassJatropha mollissimaBrazilnaturalRead from the original paper
Photo of Jatropha mollissima
© Breno Figueiredo · CC BY · iNaturalist
Equation

As printed (Table 2, p. 938)

J. mollissima: 0.1970*DBH1.8145 R2 0.8288

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

Aboveground biomass = 0.197 * D^1.8145
D
Diameter at breast height (1.3 m), cm

Table 2 prints each equation as a*DGL^b or a*DBH^b with the exponent as superscript (flattened here with ^). Biomass is oven-dry aboveground plant biomass in kg (Table 2 title), diameters in cm. Wood dried at 60 C. Plants were cut at the base and the stump was included in the weighed biomass. Perimeters were converted to diameters assuming a circular shape; for branching below measuring height, branch areas were summed into one equivalent diameter. DGL is stem diameter at ground level, mapped to DRC.

Source
R2 0.8288
R² · Table 2, p. 938
Each species was represented by 30 individuals
Trees measured · Material and methods, p. 936
Trees measured
30
R²
0.8288
Method
power equation B = a*x^b (oven-dry aboveground biomass, kg)
Where
Santaluz (Bahia) and Petrolina (Pernambuco), Depressão Sertaneja, Brazilian semiarid
Last checked
2026-11-02
Calculate
3.65
Aboveground biomass (kg)
1.72
Carbon (kg), ×0.47
6.3
CO₂e (kg), ×44/12
050100150200510152025303540DBH (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 = 53.653.65Computed from the printed form
hand-computed from the published form
D = 1526.826.8Computed from the printed form
hand-computed from the published form

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