Current issue: 51(2)
Under compilation: 51(3)
The article is a review on methods used in Central Europe and in Finland to construct growth and yield tables, and their defects and advantages. One of the main defects of growth and yield tables prepared previously in Central Europe is that the quality classes of the sites for different tree species have been formed independently and on different principles. Because of this, the yield of different tree species on a similar site can’t be compared. In addition, the quality classes of this kind of growth and yield tables and growth series are artificial.
The Society of Forestry in Finland started to prepare new yield tables for the most important tree species in Finland in 1916. The new yield tables aimed to improve the yield tables made in Central Europe in two aspects. Firstly, the quality of the site of each sample plot was assessed on the spot and independently from the standing crop. Thus the sample plots of each site class in setting up the growth series can be treated as independent groups. Because of this, the quality classes would be the same for all species of trees. Secondly, mathematical-statistical methods were used to determine which of the stands belonging to a same quality class belong to a same growth series.
The PDF includes a summary in Finnish and diagrams.