TY JOUR TI Study and creation of the source material of soybeans in the conditions of Northern Kazakhstan KW variety KW collection KW soybean KW breeding KW yield KW lodging capacity KW protein KW plasticity of varieties JO Agrarian Bulletin of the AU Kipshakbaeva, G.A. AU Amantaev, B.O. AU Tleulina, Z.T. AU Zhanbyrshina, N.Z. PY 2022 IS 217 PB Ural State Agrarian University