title: [Mathematical models for calculating volume growth, represented by the yield tables for the principal wood-producing species of Czechoslovakia].
abstract: Methods for the construction of volume increment tables for stands on the basis of the volume mean stem are described. The volume increment of the stand (iv) is expressed by the equation (Formula: see text). The stem number of stands (N) is determined directly by 100% or representative enumeration. The mean annual increment (iv) is calculated with the aid of the regression function (Formula: see text) (v) being volume of mean stem and (t) age of stand. The relations (2) were derived for 5 tree species (spruce, fir, pine, beach, oak) from the data of the new Czechoslovak yields tables (1975). The mathematical model for the tree species spruce and pine was tested on the basis of empirical material collected by the Tharandt department of forest management an forest yield science (within the framework of joint research activities) and good results were obtained. The results should be regarded as provisional ones. Further tests are envisaged.
mesh_terms: D003604:Czechoslovakia; D006128:Growth; D008433:Mathematics; D008954:Models, Biological; D014197:Trees; D014934:Wood
vernacular_title: Mathematische Modelle zur Berechnung des Volumenzuwachses dargestellt an den Ertragstafeln für die Haumptholzarten der CSSR.