Estimate tree volume in Alberta using Kozak (1988) model form with Huang (1994) parameters

Usage

vol_huang94(DBH, height, species, subregion = "Province")

Arguments

DBH: Numeric vector. Diameter at breast height (cm).
height: Numeric vector. Total height (m).
species: Character vector. Species code (e.g., "PICE.MAR").
subregion: Character vector. Alberta subregion name; defaults to "Province".

Value

A tibble with volumes (m^3): total and merchantable.

References

Huang, S. (1994). Ecologically Based Individual Tree Volume Estimation for Major Alberta Tree Species. Report 1 - Individual tree volume estimation procedures for Alberta: Methods of Formulation and Statistical Foundations. Alberta Environmental Protection, Land and Forest Service, Forest Management Division, Edmonton, AB.

Kozak, A. (1988). A variable-exponent taper equation. Canadian Journal of Forest Research, 18, 1363–1368.