TY JOUR TI PRODUCTIVITY OF AGRICULTURAL CROPS USING BIOLOGICAL PRODUCTS BASED ON RHISOSPHERIC BACTERIA (PGPR) KW biological products KW rhizospheric bacteria KW seed treatment KW spring barley KW peas KW buckwheat JO Vestnik of Kazan State Agrarian University AU Karimova , L.. AU Nizhegorodtseva , L.. AU Kolesar, V.. AU Klimova, L.R. AU Kadyrova, F.Z. AU Safin, R.I. PY 2020 IS 14 PB Kazan state agrarian University