R/Spruce_Growth.R

In Silviculturalist/forester: Forest Science and Forestry

#' Growth laws of normal spruce stands, 1904
#'
#' @source *Wuchsgesetze normaler Fichtenbestände* Mitth. aus d. forstl.
#'  Vers.-wesen Österreichs 1904. XXIX h. sid. 1 1 o. f.
#'  in Wahlgren (1922) *Skogsskötsel: handledning vid uppdragande, vård och fo̊ryngring av skog*,p. 494, 2nd Ed.
#'  Kungl. Hofboktr. Iduns tryckeri-A.-B. Stockholm, Sweden. Swedish.
#'
#'@format A data frame with columns:
#'\describe{
#' \item{Age}{A value between 10-130 with 10 yr increments}
#' \item{Height}{Height of the crop, metres}
#' \item{Height increment}{Increment since former yr}
#' \item{Bonitet}{Site productivity class}
#'}
#'
#'@description Translated from Wahlgren (1922): A. Schiffel summarised the German experience tables from **Swappach**, Lorey & Baur** such that the height development on differing site classes are as follows.
#'As can be seen from the table, the height growth of the spruce and other tree species culminates earlier on the richer sites than the poorer.
#'
#'Note: What is referred to as height here is likely mean height of the stand.
#'
#'
"Spruce_Growth"