Brachystegia spiciformis / Total volume
Brachystegia spiciformis total merchantable volume from D2H
Total volumeBrachystegia spiciformis · FabaceaeMozambiquenaturalRead from the original paper
© i_c_riddell · CC BY · iNaturalistEquation
As printed (Table 4, total tree merchantable wood volume under bark, Model 2)
Y = 2.59 × 10−5 × (DBH2 × Ht)1.008
In this library's units, ready to compute (m³)
Total volume = 2.59e-05 * (D^2 * H)^1.008D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
Model 2 (DBH2 x Ht) was the best of the three models by AIC and BIC. Volume is merchantable wood under bark (stem or branches down to a 15 cm top diameter over bark), in m3. No correction factor is stated. Total includes stem and large branches.
Source
doi:10.3390/earth6020052 · Open access · copy we read
37 B. spiciformis trees (DBH ranging from 17 to 81cm and height ranging from 12 to 26 m)
- Trees measured
- 37
- DBH range
- 17–81 cm
- Height range
- 12–26 m
- Method
- Non-linear weighted power model, Y = b0 (DBH^2 Ht)^b1 x error
- Where
- Levasflor forests, Cheringoma district, Sofala province
- Last checked
- 2026-11-02
Calculate
Height from
0.377
Total volume (m³)
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 = 30, H = 15 | 0.377 | 0.377 | Computed from the printed form computed from the published form |
| D = 50, H = 20 | 1.41 | 1.41 | Computed from the printed form computed from the published form |
Related
- Brachystegia spiciformis stem merchantable volume from D2H · same paper · Stem volume
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- Julbernardia globiflora total merchantable volume from D2H · same paper · Total volume