The investigations were aimed at studying the seasonal periodicity of the association Carici pilosae-Fagetum Oberd. 1957 as well as the association Dentario bulbiferae-Fagetum (Zlatnik 1935) Hartmann 1953 on the Ecological Experimental Station Kremnickevrchy mountains (Central Slovakia). Influence of an economic practice and planting of allochthonous woody plants was studied on quantitative and qualitative structure signs of forest phytocenoses changes.