Rationalization and optimization of work is becoming increasingly important in the European forestry sector. In this master's thesis, using modeling in the Visual Basic programming language, a tool for modeling three different thinning approaches in younger beech stands was developed namely, selective and two regimes of crop tree situational thinnings. We studied the impact of the number of candidates or crop trees and the impact of harvesting intensity on productive time. We found out that in terms of costs crop tree situational thinning is more rational compared to selective thinning, that harvesting intensity has a significant impact on time consumption and that number of candidates or crop trees has a significant impact on time consumption as well as on the relationships between main productive and auxiliary productive time. Modeling has shown that situational tending represents an alternative to classical tending (selective thinning) and since there is a decline in available subsidies for forest tending in Slovenia, it offers a new and more rational option of forest tending for Slovenian forest managing system.
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