TY JOUR TI Potential contamination weeds seeds of the chernozem southern at prolonged use mineral and organo-mineral fertilizers of the republic Crimea KW potential weeds seeds KW the soil tillage KW fertilizers KW chernozem southern KW esparcet. JO Actual directions of scientific researches of the XXI century: theory and practice AU Veselova, L.. PY 2014 IS 2 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov