TY JOUR TI Perspective directions of researches of influence of parameters roaming packs on the environmental effectiveness of the process of skidding KW timber harvesting KW energy KW eco-efficiency KW soil compaction. JO Actual directions of scientific researches of the XXI century: theory and practice AU Nikiforova, A.. AU Rudov, M.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov