TY JOUR TI IDEAS OF PROFESSOR V.V. CHUPROVA IN THE STUDY OF ORGANIC SUBSTANCE OF AGROGENICALLY CONVERSED SOILS OF SIBERIA KW Valentina Vladimirovna Chuprova KW soil organic matter KW humus formation KW transformation processes agrosoils. JO Bulletin of KSAU AU Kurachenko, N.L. PY 2021 IS 0 PB Krasnoyarsk State Agrarian University