The goal of this master's thesis was to determine the influence of the mineralogical composition on soil parameters and percolating water in profiles of pseudogley soil in Jazbina viticulture and winemaking experimental site. Samples from the top, middle, and bottom of the slope were analysed, and percolating water was sampled for chemical analysis from lysimeters three times with a one-month interval. Laboratory analysis of soil samples included X-ray diffraction analysis (XRD) of the original and clay fractions with additional treatments, determination of cation exchange capacity (CEC) using the Cu-trien method, determination of particle volume content by laser diffraction, imaging of both fractions using portable X-ray fluorescence (pXRF), determination of the total element concentrations in soil determined by inductively coupled plasma optical emission spectroscopy (ICP-OES) and atomic absorption spectroscopy (AAS), determination of soil particle size distribution obtained by sieving and sedimentation, determination of soil pH, electrical conductivity (EC) and organic humus content in the soil. Laboratory analyses of the chemical quality of percolating water samples collected from lysimeters included pH, EC, NH4+, NO3-, PO43-, Cl-, SO42-, K+, DOC, Cu, HCO3-, Na+ and NO2-. Based on the analysis results, a connection was established between mineralogical composition and CEC. Additionally, a correlation was identified between the mineral composition and specific elements in the soil and percolating water. Higher concentrations of cations were measured in samples with higher CEC and with a higher content of clay minerals and iron oxides (goethite) found in deeper layers. Most of the analysed elements and compounds accumulated at the bottom of the slope.