TY JOUR TI The impact of technological methods of sunflower cultivation on the yield and the ecology of agrocenoses KW technological methods KW the influence of pollutants KW toxicants KW the ecological balance of agrocenoses JO Actual directions of scientific researches of the XXI century: theory and practice AU Krekoten, M.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov