00640naa#a2200181#i#450# EN\\bibl\116986 20260406101413.1 1819-4036 20220228b2022####ek#y0engy0150####ca RU CHERNOZEM HUMUS STATE CHANGE OF THE CHELYABINSK REGION AS AN AGRICULTURAL USE RESULT Journal article Krasnoyarsk Krasnoyarsk State Agrarian University 2022 8 с. Journal article local Общие вопросы сельского хозяйства. 631 ZAHAROVA Irina Aleksandrovna Yumashev Haris Sadreyevich vestnik.kgau.ru