Tree Allometrics

Equations / Root biomass

Miombo coarse root biomass, DBH only

Root biomassMiombo woodland treesMozambiquenaturalRead from the original paper
Many species, no single photo
Equation

As printed (Table 1)

log(Bdest,r) = 2.262 log(DBH,dest)-3.370

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

Root biomass = exp(2.262 * ln(D) - 3.370) / 0.47
D
Diameter at breast height (1.3 m), cm

Paper gives kg carbon; divided by the paper's 0.47 carbon fraction to give kg dry mass. No correction factor, as in the paper.

Source
the mean (47%±0.20) was used for all conversions to C mass
Note · Methods
Trees measured
23
R²
0.94
Residual SE
0.43
Method
OLS on ln-transformed data, no correction factor
Where
Nhambita, Sofala province, Mozambique
Last checked
2026-11-01
Calculate
64.2
Root biomass (kg)
30.2
Carbon (kg), ×0.47
111
CO₂e (kg), ×44/12
050100150200250300350510152025303540DBH (cm)Root biomass (kg)Root 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 = 2064.264.2Computed from the printed form
hand-computed from the published form

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