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

In biometrics: A Package for Biometrics and Modelling

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.

Source

Data were provided by Prof. Timothy Gregoire, School of Forestry and Environmental Studies, Yale University (New Haven, CT, USA).

Examples

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

biometrics documentation built on March 20, 2026, 5:09 p.m.