00553naa#a2200181#i#450# EN\\bibl\80034 20260220045756.5 1819-4036 20180625b2018####ek#y0engy0150####ca RUS RU THE ASSESSMENT OF GREY SOILS FERTILITY TRANSFORMATION ACCORDING TO THE DEGREE OF HUMUS CONTENT Journal article Krasnoyarsk Krasnoyarsk State Agrarian University 2018 6 с. Journal article local . 631.679.4 RUS Sorokina O A sej.kgau.ru