gutten {FAwR}

von Guttenberg's Norway spruce (Picea abies [L.] Karst) tree measurement data.

Description

The data are measures from 107 trees. The trees were selected as being of average size from healthy and well stocked stands in the Alps.

Usage

data(gutten)

Format

A data frame with 1200 observations on the following 9 variables.

site

Growth quality class of the tree's habitat. 5 levels.

location

Distinguishes tree location. 7 levels.

tree

An identifier for the tree within location.

age.base

The tree age taken at ground level.

height

Tree height, m.

dbh.cm

Tree diameter, cm.

volume

Tree volume.

age.bh

Tree age taken at 1.3 m.

tree.ID

A factor uniquely identifying the tree.

Source

The data were kindly provided to us by Professor Boris Zeide, and are documented in von Guttenberg, A. R., 1915. Growth and yield of spruce in Hochgebirge. Franz Deuticke, Vienna (in German).

References

Robinson, A.P., and J.D. Hamann. 2010. Forest Analytics with R: an Introduction. Springer.

Zeide, B., 1993. Analysis of growth equations. Forest Science 39 (3), 549-616

Examples

data(gutten)
str(gutten)