%0 Journal Article %T Assessment of the state of soils of uncultivated agricultural lands by indicators of enzymatic activity, humus and heavy metals %A Mishchenko, N.. %A Kurochkin, I.. %A Chugay, N.. %A Kulagina, E.. %K %J Bulletin of Nizhnevartovsk State University %D 2021 %N %P 5 %I Nizhnevartovsk State University