Equations / Stem volume
Commercial stem volume from DBH, Husch log model (MV1)
As printed (Table 1, MV1 (Husch 1963; logarithmic))
In this library's units, ready to compute (m³)
Stem volume = exp(-6.5125) * D^1.88558 * 1.0527D- Diameter at breast height (1.3 m), cm
Commercial stem volume over bark (Smalian) in m3. Coefficients and CF as printed; the CF multiplies the back-transformed estimate. R2 is on the log scale. Applies to commercial stems only (stump at 30 cm, buttresses removed, crown left in the forest) of trees with DBH >= 50 cm; do not use for whole-tree totals. The authors selected the equations with commercial stem length l as the best ones; these are the ones that use only canonical variables.
doi:10.3390/f11080874 · Open access · copy we read
MV1 −6.51250 * 1.88558 * 2.318 0.67 1011.70 1.621 1.0527
Total 223 50.4–149.9 79.6 ± 19.8 0.27–0.89 0.56 ± 0.16
- Trees measured
- 223
- DBH range
- 50.4–149.9 cm
- R²
- 0.67
- Correction factor
- 1.0527 (applied)
- Method
- Linear regression on ln(V) vs ln(d), back-transformed with correction factor
- Where
- Fazenda Antimari I and II, Porto Acre, Acre
- 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 = 60 | 3.52 | 3.52 | Computed from the printed form computed from the published form |
| D = 100 | 9.23 | 9.23 | Computed from the printed form computed from the published form |
Related
- Commercial stem volume from DBH, Husch power model (MV4) · Romero et al. 2020 · DBH
- Commercial stem biomass from DBH and wood density (MB1) · same paper · Stem biomass
- Commercial stem volume from DBH, Husch power model (MV4) · same paper · Stem volume