The investigations were conducted to determine the effect of applied mineral fertilization, treatment with a waste of magnesium sulphate production on the content of selected microelements in soil effluents. The experiment was conducted for three years (2004-2006) in PVC pots with 22 kg of air-dried soil material equipped with soil effluent draining system. In the non-limed soil the contents of mobile forms of copper, zinc and manganese were higher. Liming diminished the contents of the analysed element mobile forms and slowed the soil acidification process. From among the studied elements the greatest amounts of zinc were leached from both limed and non-limed soils, whereas the smallest quantities of copper were registered in the soil effluents. Under the conditions of conducted experiment a significant effect of soil pH on leaching of the analysed microelements was observed, whereas liming generally decreased the contents of copper, zinc and manganese in the soil effluents.