siteIndex: SiteIndex

View source: R/siteIndex.R

siteIndexR Documentation

SiteIndex

Description

calculate site index according to the Norwegian H40 system

Usage

siteIndex(age, HO, SP, method = "SHARMA-BRUNNER")

Arguments

age

age at breast height (years)

HO

top height, i.e. mean of the 100 largest trees with respect to dbh per hectar (m)

SP

species code (1=spruce, 2= pine, 3= birch)

method

character for choosing the intended functions, default or "TVEITE-BRAASTAD"

Details

Reference age of 40 years

Value

H40 site index (m)

Author(s)

Lennart Noordermeer lennart.noordermeer@gmail.com

References

Tveite (1977), Tveite & Braastad (1981), Eriksson (1997), Sharma et al (2011)

See Also

HeightGrowth, HeightDiffSi

Examples

a <- c(55,55) # ages at breast height
b <- c(10.23744, 24.81046) # dominant heights (m)
SiteIndex( a, b, 1) 

hansoleorka/skogR documentation built on March 8, 2024, 7:47 p.m.