This paper is focused on statistical evaluation of prospective effects of ecological-sanitation measures (liming and fertilisation) on needle length of Norway spruce (Picea abies K a r s t.), which was planted 8 years ago on semipractice experimental plots in the neighbourhood of Nálepkovo (Slovenské rudohorie Mts). The plots were established on clearings, which appeared after calamity decayed secondary spruce forests.