Equations / Root biomass

Populus x euramericana root biomass (Table 2)

Root biomassPopulus x euramericana · SalicaceaeSpainmixedRead from the original paper

Equation

As printed (Table 2, Populus x euramericana, Roots row)

Wr = 0.122 · d²

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

Root biomass = 0.122 * D^2

D: Diameter at breast height (1.3 m), cm

Belowground biomass; fewer trees than aboveground (one tree per diameter class). Table 1 diameter range covers all sample trees, not only the root subset, so no DBH range is set. Stand type is not stated per species in the paper. Branch equations for this species are not added.

Source

Ruiz-Peinado, R., Montero, G., & del Rio, M. (2012). Biomass models to estimate carbon stocks for hardwood tree species. Forest Systems, 21(1), 42-52.

doi:10.5424/fs/2112211-02193 · Open access · copy we read

Populus x euramericana ... 8

Trees measured · Table 1, Populus x euramericana row, root biomass n column

Trees measured: 8
Method: regression fitted independently of the aboveground system
Where: Spain (sample zones per species, Figure 1)
Last checked: 2026-11-02

Calculate

DBH (cm)

27.45

Root biomass (kg)

12.9

Carbon (kg), ×0.47

47.31

CO₂e (kg), ×44/12

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%.

Inputs	Expected	We get	From
D = 15	27.5	27.5	Computed from the printed form computed from the Table 2 coefficients
D = 35	149.5	149.5	Computed from the printed form computed from the Table 2 coefficients

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Compare these curves

Populus x euramericana root biomass (Table 2)

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