TY CONF TI PARAMETERS OF THE HUMUS STATE OF CHERNOZEM LEACHED UNDER CONDITIONS OF LONG-TERM STATIONARY EXPERIENCE KW humus status parameters KW fertilizers KW ameliorant KW leached chernozem JO XIII All-Russian scientific-practical conference of young scientists «Achievements and prospects of development of the Russian agriculture", dedicated to the memory of R.G. Gareev AU Malyavskaya, A.. AU Gasanova, E.. AU Dvornikov, A.. AU Fokina, E.. PY 2023 PB TRIA FRC Kazan Scientific Center of RAS