Pittosporum tenuifolium / Total biomass
Pittosporum tenuifolium, NZ, whole-plant biomass from RCD (Table 6)
© David Orlovich · CC BY · iNaturalistAs printed (Table 6, Total biomass, Pittosporum tenuifolium)
In this library's units, ready to compute (kg)
Total biomass = 0.167 * exp(0.56 * DRC)DRC- Root collar / stem base diameter, cm
Open-spaced juvenile plants (2-year-old containerised plants on-grown for 3 years, sampled up to 5 years). The tables are headed 'at age 5 years' but the appendix figures show points from all harvest years, and the paper gives no n or RCD range for these fits, so none is recorded. x is root collar diameter in mm; biomass in g and height in m (units inferred from Table 2 and Appendix 1 means, which the equations reproduce; the paper does not print units beside the equations). r² for exponential fits is a pseudo r².
doi:10.33494/nzjfs552025x387x · Open access · copy we read
0.85
- R²
- 0.85
- Method
- nonlinear least squares, exponential (y = a e^(bx))
- Where
- Taruheru River terrace, Gisborne, New Zealand
- Last checked
- 2026-11-02
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 |
|---|---|---|---|
| DRC = 2 | 0.512 | 0.512 | Computed from the printed form hand-computed from the published form (RCD in mm, mass in g, converted) |
| DRC = 6 | 4.81 | 4.81 | Computed from the printed form hand-computed from the published form (RCD in mm, mass in g, converted) |
| DRC = 15 | 743 | 743 | Computed from the printed form hand-computed from the published form (RCD in mm, mass in g, converted) |
Related
- Pittosporum eugenoides, NZ, whole-plant biomass from RCD (Table 6) · Marden et al. 2025 · Root collar diameter
- Coprosma robusta, NZ, total aboveground biomass from RCD (Table 3) · same paper · Aboveground biomass
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- Cordyline australis, NZ, total aboveground biomass from RCD (Table 3) · same paper · Aboveground biomass
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- Cordyline australis, NZ, height from RCD (Table 3) · same paper · Height
- Cordyline australis, NZ, whole-plant biomass from RCD (Table 6) · same paper · Total biomass