picea.abies.vol: Volumes for Norwegian species

In cantonfe/sitree: Single Tree Simulator

Description

These functions calculate tree volume with or without bark for the main species in Norway, that is, Norway spruce, Scots pine, Sitka spruce, birch, and ... following Braastad (1966), Brantseg (1967), and Vestjordet (1967).

Usage

picea.abies.vol(dbh, trh, bark, units)
picea.abies.volV(dbh, trh, bark, units)
pinus.sylvestris.vol(dbh, trh, bark, units)
pinus.sylvestris.volV(dbh, trh, bark, units)
sitka.vol(dbh, trh, bark, units)
harw.nor.vol(tsl, dbh, trh, bark, units)

Arguments

dbh	A vector with diameters at breast height in mm with bark.
trh	A vector with tree heights in cm.
bark	If tree volume should be calculated with bark, "mb", or wihtout bark, "ub".
units	"l" in liters, "c" in cubic centimeters.
tsl	Tree species 30 (), 31(), 32 (), 40(), 41(), 50(), NA. This only affects the calculations of diameter without bark.

Value

Returns tree volume in the selected units.

References

Braastad, H. 1966. Volumtabeller for bjoerk [Volume tables for birch]. Meddelelser fra Det norske Skogforsøksvesen 21: 23–78. Brantseg, A. 1967. Furu sønnafjells. Kubering av staaende skog. Funksjoner og tabeller [Volume functions and tables for Scots pine. South Norway]. Meddelelser fra Det norske Skogforsøksvesen 22: 695–739. Vestjordet, E. 1967. Funksjoner og tabeller for kubering av staaende gran [Functions and tables for volume of standing trees. Norway spruce]. Meddelelser fra Det norske Skogforsøksvesen 22. Ås, Norway: Norwegian Forest and Landscape Institute.

Examples

harw.nor.vol(tsl = c(30,31), dbh = c(45, 25), trh = c(120, 80), bark = "ub", units = "l")

cantonfe/sitree documentation built on Dec. 26, 2021, 8:55 a.m.