Czasochłonność zrywki konnej w drzewostanach trzebieżowych

The paper presents time consumption assessment model (EST) of horse skidding operations in thinned stands taking into consideration factors related to stand, workday structure and characteristics of harvested timber. Significant differences in time consumption levels were observed between early and late thinning operations, as well as between examined pine, beech, spruce and fir stands. The strongest correlation between the EST and the analyzed variables was observed in the case of factors related to the volume of extracted timber.