Pinus sylvestris / Stem biomass
Mongolian pine (Pinus sylvestris var. mongolica) stem biomass from D and H (System 2, Table 4)
© Douglas Goldman · CC BY-SA · iNaturalistAs printed (Eqs. (2) and Table 4)
In this library's units, ready to compute (kg)
Stem biomass = exp(-3.7044 + 1.9074 * ln(D) + 0.9412 * ln(H))D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Mongolian pine (Pinus sylvestris var. mongolica) plantations, System 2 (D and H) of Table 4: ln W = a* + b* ln D + c* ln H, natural logarithm, coefficients as printed (a*, b*, c*). No correction factor is stated in the paper, none applied. n and D/H ranges from Table 2 (sample statistics of the fitted trees). Stem includes bark; roots exclude fine roots <5 mm. No R2 recorded (adjusted R2 only).
doi:10.3390/f7070136 · Open access · copy we read
a total of 114 Korean pine trees, 90 larch trees, and 85 Mongolian pine trees were destructively sampled
- Trees measured
- 85
- DBH range
- 6–38.7 cm
- Height range
- 3.5–22.3 m
- Method
- seemingly unrelated regression (SUR) on log-transformed additive system, ln W = a + b ln D + c ln H
- Where
- Pure plantations, northeast China
- 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 = 9.3, H = 7.3 | 11.2 | 11.2 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 19.1, H = 12.9 | 75.8 | 75.8 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 32.2, H = 18.5 | 288 | 288 | Computed from the printed form computed from the published form (coefficients as printed) |
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- Korean pine branch biomass from D and H (System 2, Table 4) · same paper · Branch biomass