Published in Scientific Papers. Series A. Agronomy, Vol. LVIII
Written by Tatiana CIOLACU
Soil degradation represents a global problem because of its influence on quality of human life, environment and biodiversity. Anthropic activity had a great influence on soil quality by onset of degradation proc sses through agriculture development. Use of soils in agriculture led to the loss of grain structure with high agronomic value. In the arable layer of these soils, predominate fraction of blocks - 40-60%. The former arable layer (25-35 cm) is characterized by nearly monolithic structure. As a consequence the recent arable layer is characterized by medium values of bulk density and the underlying layer is heavily compacted. The total porosity of arable layer is medium and of the former arable layer - small. There is a growth trend of hydrolytic acidity in the superior layers of arable land. Humus content in arable soils decreased by 2.24% in the layer 0-25 cm and by 1.65% in the 0-50 cm layer. Humus losses were respectively 36 and 31 percent of its original amount.
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