TY JOUR TI Influence of use of land resources on efficiency of receiving the crop and efficiency of cattle KW productivity KW efficiency of cattle KW natural fertility KW earth KW natural resources KW cultivated area KW crops KW market mechanism KW land use KW agriculture KW agricultural efficiency KW economic efficiency KW competitiveness KW fertility of the soil. 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