Forest cutting - possible types of felling
Forest cutting is possible by carrying out various types of felling, which are applicable when permitted by the Forest Law or unforeseen circumstances such as pests or natural disasters. Forest cutting helps to improve the quality of the forest stand and also to obtain roundwood from the forest land. Forest cutting mainly takes place using two main types of felling - main felling or tending felling. Tending felling is mostly used to improve the quality of the forest stand during the growth of the forest stand and at the same time already obtaining the first cubic meters of roundwood. On the other hand, when the forest stand has reached the felling age, then main felling is applied – clear cutting, gradual or selective cutting. It may happen that due to the impact of forest pests, forest animals or natural disasters, sanitary, reconstruction and landscape felling must also be carried out in the forest.
Main felling
Main felling is forest cutting when the felling age or diameter of the forest stand has been reached. This felling has 2 possible types of execution – clear cutting and gradual felling. Clear cutting is forest cutting where the forest stand is cut down in one go, where the clear cutting area may be from 2-5 hectares depending on the type of forest stand - in a dry pine forest, swampy forest, transitional forest, damp forest, greenwood forest and hardwood forest the maximum area can be 5 hectares, in other forest types no more than 2 hectares. After clear cuttings, it is mandatory to carry out forest regeneration - artificial planting of trees or allowing the forest stand to regenerate naturally within 5 years.
In rarer cases, gradual felling is carried out as the main felling. In this case, forest cutting takes place in several passes, where the aim is to achieve natural forest regeneration under the crowns of the remaining trees. The forest stand is completely cut down when the number of naturally regenerated trees is in accordance with the law to consider the forest stand as regenerated.
Main selective felling
Main selective felling is forest cutting that does not involve complete cutting down of the forest stand. Selective cutting is applied in forests of different ages, periodically cutting down a part of the forest stand that does not exceed the growth. Forest cutting with selective cutting stipulates that the cross-sectional area must not be reduced below the critical cross-sectional area. Selective cuttings are mostly used in cases where clear cutting is prohibited.
Tending felling
The main purpose of forest cutting using tending felling is to improve the growing conditions of the trees in the forest stand and to leave the desired and most profitable tree species. Tending felling is divided into 2 stages - tending of young stands and tending cutting of growing stock. Tending of young stands begins when low-quality tree species begin to suppress high-quality species and the desired tree species composition must be achieved, freeing up space for them to grow faster.
Tending cutting of growing stock
Forest cutting using tending cutting of growing stock makes it possible to obtain the first income. In younger forests, mostly less valuable assortments such as firewood and pulpwood will be obtained, while in older forests you will also get valuable assortments such as logs and veneer. There is no point in carrying out tending cutting of growing stock in forest stands older than 50 years, as it will no longer improve the growth productivity of the remaining trees.
Sanitary felling
Forest cutting using sanitary felling is possible if the forest stand has suffered from natural disasters, or pest and animal damage. Forest cutting in sanitary selective felling is carried out until the cross-sectional area of the remaining, healthy trees is greater than the critical cross-sectional area. On the other hand, if the cross-sectional area of healthy trees is less than the critical one, then the forest stand is cut down in sanitary clear cutting.
Reconstructive felling
Forest cutting using reconstructive felling is possible if there is an opinion from the State Forest Service that the cross-sectional area of the forest stand is below the critical value, or if the forest stand is irreversibly damaged as a result of pests, animals or diseases.