siteIndex | R Documentation |
calculate site index according to the Norwegian H40 system
siteIndex(age, HO, SP, method = "SHARMA-BRUNNER")
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" |
Reference age of 40 years
H40 site index (m)
Lennart Noordermeer lennart.noordermeer@gmail.com
Tveite (1977), Tveite & Braastad (1981), Eriksson (1997), Sharma et al (2011)
HeightGrowth, HeightDiffSi
a <- c(55,55) # ages at breast height
b <- c(10.23744, 24.81046) # dominant heights (m)
SiteIndex( a, b, 1)
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