This paper studies typical chernozem, specifically for the Topraisar and Amzacea area,Constanta County. This soil type is characteristic for Central Dobrogea, as well as for other lowlandregions of Romania. Its intense exploitation in agriculture caused changes in some certain properties. Inthis paper, the main properties of typical chernozem are studied. For physical, chemical andmicrobiological soil characterization samples from the soil profile were collected. Tthe followingparameters have een determined: soil texture, soil structure in plowing and underlying horizons, thedegree of compaction, soil porosity, total cationic exchange capacity, nutrients storage, pH, calciumcarbonate content, organic matter content and soil microbial activity. The land evaluation marks havebeen also calculated for this soil type and changes in yields values due to the changes of the restrictiveindicators coefficients have been highlighted. The high natural fertility of this soil, the high content oforganic matter and nutrients recommended it to be used for a variety of crops cultivated in these areas.Intense exploitation in agriculture, the use of farm machinery with high weight and the execution nu eapplication? of soil tillage at inappropriate soil moisture, determined certain soil properties changes. Theaim of this work paper was to highlighting these soil characteristics which have been modified under theinfluence of anthropogenic factors. The research found that, between them, the reducing of soil porosityand the increasing of soil compaction in horizons under plowed layer of soil are the main features thatled to a decreasing agricultural production. Interpreting the data collected from field, laboratory testresults and determining the land evaluation marks for the study area, it was concluded that the indicatorwhich is responsible for the decrease of agricultural production is the climate conditions and the low soilporosity. This soil characteristic was induced by human activities. To eliminate the negative impacts of it,specific measures of land use have been proposed.

Typical chernozem, physic-chemical, soil, characterization, land use

Presentation: oral