trees {spuRs} | R Documentation |
These are a subset of the von Guttenberg data, a set of measurements on Norway spruce (Picea abies [L.] Karst) in several different locations and site categories.
data(trees)
A data frame with 1200 observations on the following 3 variables.
These data were kindly provided by Professor Boris Zeide, University of Arkanasa, Monticello, AK, USA, and are further documented in Zeide (1993).
A.R. von Guttenberg. 1915. Growth and yield of spruce in Hochgebirge. Franz Deuticke, Wien. (In German)
B. Zeide, 1993. Analysis of growth equations. Forest Science 39 594–616.
data(trees)