Julbernardia globiflora / Stem volume
Julbernardia globiflora stem merchantable volume from D2H
Stem volumeJulbernardia globiflora · FabaceaeMozambiquenaturalRead from the original paper
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Equation
As printed (Table 5, stem merchantable wood volume under bark, Model 2)
Y = 8.34 × 10−6 × (DBH2 × Ht)1.1470
In this library's units, ready to compute (m³)
Stem volume = 8.34e-06 * (D^2 * H)^1.147D- 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. Exponent printed as 1.1470 in the table; entered as 1.147. Stem part only.
Source
doi:10.3390/earth6020052 · Open access · copy we read
23 J. globiflora trees (DBH ranging from 14 to 62 cm and height ranging from 12 to 23 m)
- Trees measured
- 23
- DBH range
- 14–62 cm
- Height range
- 12–23 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
0.456
Stem 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 | 0.456 | 0.456 | Computed from the printed form computed from the published form |
| D = 50, H = 20 | 2.05 | 2.05 | 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