spati {lmfor}

Raw sample plot data of Scots pine in Ilomantsi, Finland.

Description

A dataset of Scots pine growth. The trees were collected on 56 fixed-area sample plots. The data includes no remeasurements. The growth data are based on measurements of increment borer chips.

Usage

data(spati)

Format

A data frame with 9913 observations on the following variables.

plot

A unique sample plot id.

X

Plot size in X-direction, meters

Y

Plot size in y-direction, meters

N

Stand density, trees per ha

G

Basal area, m^2/ha

V

Plot volume, m^3/ha

Dg

Basal-area weighted mean diameter, cm

Hg

Height of basal area median diameter tree, m

Tg

Age of basal area median tree, yr

Hdom

Dominant height, m

maos

percentage of Scots pines of the total volume

kuos

percentage of Norway spruces of the total volume

kanro

A unique sample plot id (same as plot).

puunro

Tree id within plot.

pl

tree species. 1=Scots Pine

xk

x- coordinates of trees within plot

yk

y- coordinates of trees within plot

d

Tree diameter at breast height (1.3 meters above the ground) in cm.

h

Tree height, m.

t

Tree age, years

dk

Tree diameter at stump height, cm. there seems to be some unclear issues.

X2b

Double bark thickness, mm

id1

Tree diameter growth within the 5 year period prior to the measurement. Missing data coded as -1.

id2

Tree diameter growth within the period 6-10 years prior to the measurement. Missing data coded as -1.

Author(s)

The data were collected by Timo Pukkala.

References

Pukkala, T. 1989. Prediction of tree diameter and height in a Scots pine stand as a function of the spatial pattern of trees. Silva Fennica 23(2): 83-99. doi:10.14214/sf.a15532

Mehtatalo, Lauri and Lappi, Juha 2020. Biometry for Forestry and Environmental Data: with examples in R. New York: Chapman and Hall/CRC. 426 p. doi:10.1201/9780429173462