Abstract:
The paper presents research results of soil tillage influence on some physical properties of the chernozem cambic over
60 years period. For the witness soils were investigated the same indicators of cambic chernozem non modified
anthropogenic from forest protection belt. The intensive agriculture in Moldova led to physical, chemical and biological
soil degradation. The fallow cambic chernozem is characterized with loamy-clayey texture throughout the profile and a
pronunciation cambic Bhw1 and Bhw2 horizons. The physical clay content varies in its profile from 51% in the fallow
layer up to 55% in the cambic horizons, and clay content - from 35% to 38%, respectively. The arable cambic
chernozems have a clayey-loamy texture, the physical clay content about 60-61% in the humiferous profile, 56-58% - in
the BC and C horizons The clay content in A and B horizons varies between 39-40%, and in the BC and C horizons -
within the limits of 56-57%. The conventional soil tillage system in Moldova based on the annual plowing with
returning furrow had the effect of lowering the reserve of humus, through intensification of the organic matter
mineralization in soil arable layer, decreasing hydrostability of the structural aggregates, increasing vulnerability of soil
to degradation by compaction. Insufficient use of chemical and organic fertilizers, secondary strong compaction of the
arable layer leads to decreasing their production capacity by two times.
