Equations / Stem biomass
Pinus cembroides, additive system S2 (D and H): stem biomass
As printed (Fig. 2a, Table 1 (S2))
In this library's units, ready to compute (kg)
Stem biomass = exp(-2.007449) * D^1.776093 * H^0.364976D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
System S2 (Eq. 7-10, B = exp[β0] × Dn^β1 × H^β2) fitted by GMM. Table 1 labels the H exponents β13, β23, β33 (read as β12, β22, β32). Table 1 prints the twig-and-leaf intercept β30 as 2.07281 (no minus) while Fig. 2c prints exp(−2.0728); the negative sign is used because the positive one gives hundreds of times the observed biomass. Adjusted R2 (not stored): stem 0.9704, branches 0.9476, twigs with leaves 0.9294, total 0.9802.
doi:10.21829/myb.2020.2611821 · Open access · copy we read
un total de 21 árboles
- Trees measured
- 21
- DBH range
- 3–40 cm
- Height range
- 1.2–9.4 m
- Method
- Additive nonlinear system of component equations fitted simultaneously by generalized method of moments (GMM)
- Where
- Sombrerete, Cadereyta de Montes, Querétaro (bosque de pino, 2600 m)
- Last checked
- 2026-11-02
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
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 = 14.1, H = 3.7 | 23.8 | 23.8 | Computed from the printed form computed from the published form (Fig. 2 and Table 1 coefficients) |
| D = 28.9, H = 6.9 | 106.9 | 106.9 | Computed from the printed form computed from the published form (Fig. 2 and Table 1 coefficients) |
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- Pinus cembroides, additive system S2 (D and H): total aboveground biomass (sum of components) · same paper · Aboveground biomass
- Pinus cembroides, additive system S2 (D and H): branch biomass · same paper · Branch biomass
- Pinus cembroides, additive system S2 (D and H): foliage (twigs with leaves) biomass · same paper · Foliage biomass