Stand volume functions for Picea abies in eastern, central and northern Norway

A material of 615 observations was used to develop Norway spruce (Picea abi es (L.) Karst.) stand volume Functions for eastern, central and northern No rway. A multiplicative model with three independent variables was found to be most suitable. The independent variables were stand basal area. Lorey's mean height, and site index. The R-2 value was 0.993 and the coefficient of variation 5.43%. Testing by means of two independent data sets indicated t hat the function is suitable for practical prediction purposes for differen t site qualities and in different geographic regions of the country.