TY JOUR TI NITROGEN-CONTAINING COMPOUNDS SEASONAL DYNAMICS AND AGRICHERNOZEM ENZYMES ACTIVITY USING ZERO TREATMENT TECHNOLOGY KW zero processing technology KW organic and mineral forms of nitrogen KW urease and protease activity JO Bulletin of KSAU AU Belousova, E.N. PY 2022 IS 0 PB Krasnoyarsk State Agrarian University