Pushing the boundaries with research and innovation in forest engineering October 9-13, 2011, Graz 1 Damages inflicted to remaining trees, soil and regeneration in single - tree selection cuttings in mixed (coniferous and beech) stands from mountainous areas of Romania Gheorghe Spârchez, Rudolf Derczeni*, Eugen Iordache, Răzvan Enache, Marius Mihăilă Faculty of Silviculture and Forest Engineering University of Transilvania Braşov, Şirul Beethoven No. 1, Braşov - 500123 , Romania sparchez@unitbv.ro , derczeni@unitbv.ro , i.eugen@unitbv.ro Abstract: Research was conducted in mixed coniferous and beech stands located in Braşov mountainous area during single – tree harvesting. This paper presents data regarding the damages inflicted to the remaining trees, regeneration and soil during skidding operations. Keywords: damages, ecosystem protection, single – tree selection cuttings 1 Introduction Single - tree selection is advisable to be applied in natural forests, uneven and relative uneven aged. It is the most intensive harvesting method of the forest and it is characterised by the following: ‐ maintain constant size and structure of current growth in volume; ‐ forest possibility is harvested with continuity; ‐ provide a continuous and effective natural regeneration in relation with ecological and economical demands; ‐ maintaining genetic diversity and preserve the natural genetic fund particularly valuable from the mountain forest massifs. Logging in case of single - tree selection is more difficult and more expensive. Cuttings takes place on larger areas than other harvesting methods and the volume harvested per hectare is lower than in case of cuttings made in even aged stands. The equipments used must be supple in order to produce minimum damages to the remaining trees, seedling and soil. In this paper are analyzes the influence of forest logging to the remaining trees, seedling and soil in mixed beech and coniferous stands located in the mountains of the Curvature Carpathians in which were applied single - tree selection cuttings. 2 Place of research. Method of research The research was conducted in stands located in Postavaru Massif, Management Unit No. V Noua in which were made cuttings for regeneration (Figure 1). Table 1 presents the general conditions of the compartments where the researches were made.