Current issue: 55(4)
Under compilation: 55(5)
In a natural state growing closed forest the amount of timber grows yearly. However, in the same time the timber volume also decreases when part of the trees die in the competition for light and other growth factors.
There are many interactive functions and characteristic that influence the growth and drain in a stand. These can be illustrated as mathematical models. The article discusses a set of models.
The volume 34 of Acta Forestalia Fennica is a jubileum publication of professor Aimo Kaarlo Cajander.
The article is a presentation given by the author on occasion of visit from Austrian timber industry and foresters (August 17th 1923), and again for the German visitors (August 20th 1923) in Punkaharju, Finland. The speech deals with the question of the overuse of Finnish forest compared to their growth. The developments of slash-and-burn-culture and forest inventories are described. The results of the inventories show, though still in preliminary state, that there is no nationwide overuse in total, though there are some locations where the felling are bigger than growth.