TY JOUR TI ORGANIC CARBON CONTENT IN STRUCTURAL UNITS OF LEACHED CHERNOZEM WITH INCREASING DOSES OF MINERAL FERTILIZERS IN THE FOREST-STEPPE ZONE OF THE URALS KW organic carbon KW structural units KW structural coefficient KW agronomically valuable aggregates KW carbon content KW organic carbon reserves JO Vestnik of Kazan State Agrarian University AU Demin, E.A. AU Nakov, D.D. AU Volkova, N.A. PY 2024 IS 19 PB Kazan state agrarian University