Forestry must be understood as continuous forest management – felling, planting, and tending. Trees must be felled when they are mature, and every species has its own felling age. According to the law, spruce can be felled from the age of 81, but in skilfully managed stands, this could be done from the age of fifty, which is a significant difference.

The felling time for pine, meanwhile, depends on growth conditions. If it grows in rich soil, as evidenced by shrubs in the undergrowth, then the pine could be felled as early as 80–85 years of age; if the soil is poor (sandy ground with lichens and mosses), the hundred-year threshold should be reached, as stipulated by law. Birch, on the other hand, is twice as fast-growing – with skilled management, they can be felled at around fifty years of age.