The aim of the experiment was agrochemical evaluation of the influence of liming and fertilization with ammonium or nitrate nitrogen on changes of pH, acidity and saturation of sorption complex with exchangeable cations. The study was based on chemical analysis of soil materials obtained from a two-year pot experiment. The factors of the study were: liming, fertilization with ammonium sulphate or calcium nitrate at two levels and fertilization with phosphorus in two doses. The obtained results indicated that liming as well as nitrogen forms influenced significantly the indicators of soil acidification. The use of CaCO3 and nitrate nitrogen caused an increase of pH and decrease of hydrolytic acidity, exchangeable acidity and mobile aluminium. The content of mobile aluminium also was significantly lower in treatments fertilized with superphosphate in higher level. The content of Mg2+, Na+ and K+ was higher in treatments fertilized with ammonium sulphate than with calcium nitrate. A different situation was observed in the case of Ca2+. The content of calcium ions was the highest in treatment limed and fertilized with calcium nitrate at higher dose. Granulated triple super-phosphate fertilization did not essentially influence the sorption complex of soil.