biometrics (version 1.0.3)

biomass: Contains tree-level biomass data for four species in Canada.

Description

These are tree-level variables for four species in Canada.

Usage

biomass

Format

Data contain the following columns:

tree

Tree number code.

spp

Species common name, as follows: Balsam fir is Abies balsamea, Black spruce is Picea mariana, White birch is Betula papyrifera, and White spruce is Picea glauca.

dbh

Diameter at breast height, in cm.

toth

Total height, in m.

totbiom

Total biomass, in kg.

bolebiom

Stem biomass, in kg.

branchbiom

Branches biomass, in kg.

foliagebiom

Foliage biomass, in kg.

Examples

data(biomass)
head(biomass)
tapply(biomass$totbiom,biomass$spp,summary)