TY JOUR TI Personal subsidiary farms – problems and realities of modern days in land use KW LPH KW production of main types of cultures KW productivity KW natural fertility KW earth KW natural resources KW cultivated area KW crops KW market mechanism KW land use KW agriculture KW economic efficiency KW competitiveness KW fertility of the soil KW chemical and mineral fertilizer. JO Actual directions of scientific researches of the XXI century: theory and practice AU Ubaydullaev, M.. PY 2015 IS 3 PB FSBE Institution of Higher Education Voronezh State University of Forestry and Technologies named after G.F. Morozov