Treeht                  Tree data from the long-term forest experiments
                        in Sweden
broad                   Tree data from the long-term forest experiments
                        in Sweden
broadleaves             A response calibration function for the other
                        broadleaves
conifers                A response calibration function for the other
                        conifer species
main_species            Main species generalized function response
                        calibration
species_specific        Species-specific response calibration for Scots
                        pine, Norway spruce, and Birch
