TY JOUR TI EFFICIENCY OF THE APPLICATION OF HORN-HOOFED CRUMB AND TREPEL UNDER ROW CROPS AND IN AFTEREFFECT ON BARLEY KW horn-hoofed crumb KW zeolite KW trepel KW organic fertilizer KW nitrates KW potatoes (Solanum tuberosum) KW fodder beet (Beta vulgaris) KW barley (Hordeum sativum). JO Vestnik of Kazan State Agrarian University AU Eliseev, I.P. AU Eliseeva, L.V. AU Shashkarov, L.. PY 2021 IS 15 PB Kazan state agrarian University