Pinus cembroides / Aboveground biomass
Pinus cembroides total aboveground biomass from DBH (quadratic in ln D)
As printed (Cuadro 3 (Bt, modelo 3); R2 ajustada 0.94 in Cuadro 5)
In this library's units, ready to compute (kg)
Aboveground biomass = exp(5.078 - 3.764*ln(D) + 1.284*(ln(D))^2)D- Diameter at breast height (1.3 m), cm
Bt = total biomass (leaves-branches + stem), selected as best model for total biomass in P. cembroides (Resultados, Biomasa por componente). Decimal point in the original. Plantation 22 years old. Biomass by the indirect Adelaide method (leaves-branches by reference branch, stem by Smalian volume times basic density), so the stem and total values are not weighed directly. Cuadro 5 R2 is the adjusted R2. The paper prints no correction factor for the ln back-transform, so none is applied. Ranges are from Cuadro 2 (n = 50).
doi:10.29298/rmcf.v9i47.172 · Open access · copy we read
ln B = β0 + β1 ln(Dn) + β2 ln(Dn)2 + ε
con una muestra de 50 árboles por especie
- Trees measured
- 50
- DBH range
- 6.1–11 cm
- Height range
- 2.9–4.4 m
- R²
- 0.94
- Method
- ln-ln least squares in R; no correction factor stated
- Where
- Cuauhtémoc and El Recreo ejidos, Saltillo, Coahuila
- 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 = 7 | 13.7 | 13.7 | Computed from the printed form computed from the published form (coefficients as printed, no correction factor) |
| D = 9 | 20.2 | 20.2 | Computed from the printed form computed from the published form (coefficients as printed, no correction factor) |
| D = 11 | 31 | 31 | Computed from the printed form computed from the published form (coefficients as printed, no correction factor) |
Related
- Tropical pines AGB from DBH (Eq. 3.1.8 / 3.2.8) · Brown 1997 · DBH
- Total aboveground biomass, Pinus tecunumanii shade trees, exponential DBH+H · Chalupová et al. 2026 · DBH + Height
- Total aboveground biomass, Pinus tecunumanii shade trees, power-law DBH+H · Chalupová et al. 2026 · DBH + Height
- North American taxa group: Pinus ≥ 0.45 spg (Table 5) · Chojnacky et al. 2014 · DBH
- Pinus caribaea total aboveground biomass, sum of simultaneous component models · Coutinho et al. 2018 · DBH + Height + Wood density
- Pinus cembroides, additive system S2 (D and H): total aboveground biomass (sum of components) · Cuevas Cruz & Aquino Ramírez 2020 · DBH + Height
- Pinus brutia total biomass, Lebanon (Eq. 37) · de-Miguel et al. 2014 · DBH + Height
- Pinus brutia total biomass, Lebanon (Eq. 38) · de-Miguel et al. 2014 · DBH
- Pinus cembroides stem biomass from DBH (cubic in ln D) · same paper · Stem biomass
- Pinus halepensis total aboveground biomass from DBH and height (combined variable) · same paper · Aboveground biomass
- Pinus halepensis stem biomass from DBH and height (combined variable) · same paper · Stem biomass