00713naa#a2200217#i#450# EN\\bibl\112401 20260314205926.6 2311-1402 20210625b2021####ek#y0engy0150####ca RUS RU Assessment of the state of soils of uncultivated agricultural lands by indicators of enzymatic activity, humus and heavy metals Journal article Nizhnevartovsk Nizhnevartovsk State University 2021 5 с. Journal article local . 631.45/504.062 RUS Mishchenko Natalya V Kurochkin Ivan N Chugay Natalya V Kulagina Ekaterina Yu nvsu.editorum.ru