Gliricidia sepium / Height
Gliricidia sepium height from D (non-rectangular hyperbola, Table 3)
HeightGliricidia sepium · FabaceaeIndonesiaagroforestryRead from the original paper
葉子 · CC0 · iNaturalistEquation
As printed (Table 3)
y = 0.5 x (a x x + b - sqrt((a x x + c)^2 - 4 x a x x x b)); H on DBH: a 1.0901, b 10.941, c 11.0, r 0.722
In this library's units, ready to compute (m)
Height = 0.5 * (1.0901 * D + 10.941 - sqrt((1.0901 * D + 11.0)^2 - 4 * 1.0901 * D * 10.941))D- Diameter at breast height (1.3 m), cm
Formula typeset exactly as in the Table 3 caption. Authors state the best fit was obtained with maximum height fixed at 11 m (c = 11.0). Only a multiple correlation coefficient (r = 0.722) is given, not R2, so none is recorded.
Source
doi:10.1007/s10457-013-9602-4 · Open access · copy we read
28 G. sepium trees
- Trees measured
- 28
- DBH range
- 7–44.1 cm
- Height range
- 7.3–12.9 m
- Method
- non-rectangular hyperbola (Thornley 1976), maximum height fixed at 11 m
- Where
- Bulili, Kecamatan Palolo, Central Sulawesi (shade trees in cacao agroforestry)
- Last checked
- 2026-11-02
Calculate
10.1
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 | 10.1 | 10.1 | Computed from the printed form computed from the published form (coefficients as printed) |
| D = 30 | 10.9 | 10.9 | Computed from the printed form computed from the published form (coefficients as printed) |
Related
- Aleurites moluccana height from D (linear, Table 2) · same paper · Height