RESEARCH ON THE INFLUENCE OF TILLAGE SYSTEM ON THE PHYSICO-CHEMICAL PROPERTIES OF CHERNOZEM CULTIVATED WITH MAIZE FROM THE URZICUTA LOCALITY, DOLJ COUNTY, ROMANIA
The influence of the applyed system of practices on the soil’s properties gives indicators that are important for preserving soil fertility and for assessing the sustainability of the system. The preservation of te soil’s fertility involves the application of a system of practices that corellates the cultivation requirements of the plant with the changes induced in the soil, while ensuring the improvement of the soil’s properties, while also ensuring that large and constant yields are obtained. In order to analyze the influence of the cultivation technology on the properties of the soil cultivated with maize from the Urzicuța locality, Dolj county, Romania, in 2019 an experiment was made, in which A represents the applied soil practices (a1-conventional and a2 - minimum tillage) with control and fertilized variants, as following - b1-unfertilized, b2-N100P50K0, b3-N100P50K50, b4-N150P50K50 and b5-N100P0K0. The following soil chemical analyses were performed - the soil’s pH reaction, humus content, total Nitrogen, Phosphorus, Potassium and Copper, Zinc, Iron and Manganese in mobile forms. To determinate the physical properties bulk density, total porosity and the degree of compaction. Applying the minimum tillage system practices showed that there are no significant changes in terms of bulk density, total porosity and degree of compaction, but the Chernozem on which the research was performed, has a high content of nitrogen, phosphorus and potassium compared to the conventional system variants.
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