TY JOUR TI Influence of the optimization of the norms of organic and mineral fertilizers on the yield of green mass and indicators of the quality of fodder on stubble crops of mixed crops KW fertilizers KW fertility soil KW stybble crops KW mixed crops KW protein KW green mass KW yield KW feed unit JO Agrarian Bulletin of the AU Allahverdiev, E.. PY 2021 IS 207 PB Ural State Agrarian University