Assessment of the state of soils of uncultivated agricultural lands by indicators of enzymatic activity, humus and heavy metals

Studies were conducted to determine such indicators as humus, heavy metals, and enzymatic activity in the soils of uncultivated farmlands Vladimir region located Klyazma river basin. In course field research 2018, soil samples selected at 13 points representing various landscape areas belonging According results research, a positive relationship between enzymes content humus was established. farmland, where there is high concentration enzymes, percentage found from 2.88% 3.96%. The dependence anthropogenic impact revealed. Thus, transition deposits meadow, i.e. reduce on soil, sharp increase invertase, catalase dehydrogenase, an active process humification soil. detected concentrations metals farmland do not exceed standards set for approximate permissible concentrations, but their quantitative has increased significantly over past decade, accumulation occurs potential danger case secondary input these into agricultural use.