| Summary: | During the period of 1991-1993 in the field experiment, the effect of different soil management (tillage 0,24 m and tillage 0,12-0,15 m) in ecological and integration management system on changes of inorganic nitrogen (Nan = N-NH4 + + N-NO3 -) content in the soil layer from 0 up to 0,6 m of the soil depth (0,00-0,30 m and 0,30- 0,60 m) were studied. Trials were held in a warm climatic zone of the South – Western Slovakia on the brown soil. Different soil management systems (tillage 0,24 m and tillage 0,12-0,15 m) considerably did not affected ammonification and nitrification processes in the soil. The sustainability of minimalization via shallow ploughing is not excluded, on the contrary this minimalization may have high a positive influence on economic saving the energy, labour costs, etc. The quantitative and qualitative changes of studied form of N were significantly effected by weather and soil depth. Soil content of N-NH4 + and N-NO3 - was in negative correlation with soil depth.
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