Equations / Foliage biomass
Sugar maple leaf biomass from DBH, unmanaged stand
Kent P. McFarland · CC0 · iNaturalistAs printed (Fig. 2 caption (log form))
In this library's units, ready to compute (kg)
Foliage biomass = 0.00157 * D^2.447D- Diameter at breast height (1.3 m), cm
Output is total leaf biomass only (oven-dried leaves, kg), not petioles or seeds. Table 3 coefficients are the back-transformed form with the bias correction already in the intercept. Hosts: sugar bushes slightly ice-damaged (<5%) in 2000. The 'managed' stand is a sap-production sugar bush, set as natural stand type (not planted); the paper does not give stand origin. R2 is the log-scale value printed in Table 3 and the Fig. 2 caption.
doi:10.5558/tfc77643-4 · Open access · copy we read
LT = 0.00157*DBH^2.447
Twelve trees were sampled from an unmanaged stand north of Madoc and 10 from a managed stand near Newburg
- Trees measured
- 12
- DBH range
- 21.3–58.5 cm
- Height range
- 18–27.4 m
- R²
- 0.923
- Method
- log-linear regression, back-transformed by adding half the squared SEE to the intercept (Baskerville 1972)
- Where
- unmanaged stand north of Madoc, eastern Ontario
- Last checked
- 2026-11-02
Shaded: the DBH range the model was fitted on. Other inputs held at the values above.
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 = 25 | 4.14 | 4.14 | Computed from the printed form hand-computed from the published form |
| D = 40 | 13.1 | 13.1 | Computed from the printed form hand-computed from the published form |
| D = 60 | 35.2 | 35.2 | Computed from the printed form hand-computed from the published form |
Related
- Sugar maple leaf biomass from DBH, managed stand (sugar bush) · Ter-Mikaelian & Lautenschlager 2001 · DBH
- Sugar maple leaf biomass from DBH, managed stand (sugar bush) · same paper · Foliage biomass