Alnus rubra / Foliage biomass
NSVB red alder, Marine Division (240): foliage biomass, Schumacher-Hall model (Eq. 1)
Foliage biomassAlnus rubra · BetulaceaeUnited StatesRead from the original paper
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Equation
As printed (Table S9a (Table S9a_foliage_coefs_spcd.csv, WO-GTR-104-Supp1), columns SPCD,DIVISION,STDORGCD,model,a,a1,b,b1,c,c1)
351,240,,1,11.65237317,,2.791100545,,-1.520751946,
In this library's units, ready to compute (kg)
Foliage biomass = 0.45359237 * 11.65237317 * (D/2.54)^2.791100545 * (H/0.3048)^(-1.520751946)D- Diameter at breast height (1.3 m), cm
H- Total tree height, m
DBH is measured at 4.5 ft (1.37 m). Paper units: in, ft, lb; expression converts D cm→in (/2.54), H m→ft (/0.3048) and lb→kg (×0.45359237). n and the DBH range are from the scorecard for FOL_DW in 240 (table S19).
Source
doi:10.2737/WO-GTR-104 · Open access · copy we read
yi = a × Di^b × Hi^c + εi
Di is diameter (inches) at breast height (4.5 feet), Hi is total tree height (feet)
units for volume and biomass predictions are cubic feet and pounds, respectively
351,red alder,N,Alnus,rubra,,,Alnus rubra
"Foliage","FOL_DW","351","240","MARINE_DIVISION",53,10.2358490566038,1,24.8
key modeling statistics such as sample sizes (n), tree diameter distributions (minimum, mean, and maximum)
- Trees measured
- 53
- DBH range
- 2.54–62.99 cm
- Method
- NSVB Schumacher-Hall model (Eq. 1), coefficients for SPCD 351 in DIVISION 240 from table S9a; fitted with weighted regression to destructively sampled trees
- Where
- FIA ecodivision Marine Division (240), mapped in GTR fig. 1
- Last checked
- 2026-11-03
Calculate
Height from
8.5
Foliage biomass (kg)
3.99
Carbon (kg), ×0.47
14.6
CO₂e (kg), ×44/12
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 = 30.5, H = 21.3 | 8.5 | 8.5 | Computed from the printed form computed from the published form at D = 12 in, H = 70 ft, converted to cm, m and kg |
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