Tectona grandis / Height
Teak height from D (H2, logarithmic)
HeightTectona grandis · LamiaceaeNepalplantationRead from the original paper
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Equation
As printed (Abstract; Table 5, model H2)
H = [− 5.2544 + (6.8603 × ln (dbh))]
In this library's units, ready to compute (m)
Height = -5.2544 + 6.8603 * ln(D)D- Diameter at breast height (1.3 m), cm
H is total height excluding the 0.10 m stump. R2 0.928 (adj. 0.921), RMSE 1.46 printed in Table 5. Selected as best height-diameter model by the authors.
Source
doi:10.31357/jtfe.v7i1.3020 · Open access · copy we read
31 (70 % of the data) were randomly selected to build the model
dbh (cm) 6.37 58.92; H (m) 5.70 26.10
- Trees measured
- 31
- DBH range
- 6.37–58.92 cm
- Height range
- 5.7–26.1 m
- R²
- 0.928
- Method
- least squares on training set (31 of 44 felled trees)
- Where
- Sagarnath Forestry Development Project, Sarlahi district, central lowland Nepal
- Last checked
- 2026-11-02
Calculate
10.5
Height (m)
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 = 10 | 10.5 | 10.5 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 30 | 18.1 | 18.1 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 55 | 22.2 | 22.2 | Computed from the printed form computed from the published form (coefficients as printed) |
Related
- Teak stem volume from D and H (V5, generic) · same paper · Stem volume
- Teak stem volume from D (V1, local) · same paper · Stem volume