TY JOUR TI Soil conditions in spruce stands of artificial origin in the case of Belarus KW soil KW humus KW soil particle size distribution. JO Actual directions of scientific researches of the XXI century: theory and practice AU Balakir, M.. AU Bosak, V.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov