TY JOUR TI PRODUCTIVITY OF SILFIUM PERFOLIATUM DEPENDING ON METHODS AND TECHNOLOGIES OFCULTIVATION IN SOIL-CLIMATE CONDITIONS OF THE REPUBLIC OF BELARUS KW silvia KW fertilizers KW composition KW yield KW productivity KW chemical KW nutritional JO Bulletin Samara State Agricultural Academy AU Yemelin, V.A. PY 2018 IS 3 PB Samara State Agrarian University