TY JOUR TI TECHNIQUE AND TECHNOLOGY OF SURFACE IMPROVEMENT OF FLOODPLAIN MEADOWS OF THE REPUBLIC OF TATARSTAN KW floodplain meadows KW technique and technology KW surface improvement KW seeding KW alfalfa-stalk grass mixtures KW field germination KW grass density KW green mass KW yield KW feed units KW profitability KW cost KW bioenergetic coefficient. JO Vestnik of Kazan State Agrarian University AU Safiollin, F.N. AU Valiev, A.R. AU Hismatullin, M.M. AU Suleymanov, S.R. AU Sochneva, S.. PY 2023 IS 17 PB Kazan state agrarian University