Sulphur and nitrogen input to the Ratanica forested catchment (Carpathian Foothills,southern Poland)

The study covers 1991–1994 concentrations of SO₂ and NO₂ in the air, concentrations of sulphur and nitrogen in bulk precipitation, throughfall and stemflow as well as input of S and N to the Ratanica forested catchment (S. Poland), which is exposed to moderate anthropogenic pollution are presented. There was high input of sulphur (26 kg ha^?1) and nitrogen (24 kg ha^?1) to the catchment, mainly in NH4⁺ (18 kg ha^?1). The significant contribution of NH₄ ⁺ connected with intensive agriculture in surrounding fields has led to eutrophication of the ecosystem.