Eroded abandoned lands occur on an area of apr. 2000 ha. Their emergence was caused by deforestation, burning, grazing, improper land use and cultivation, and especially erosion leading to a karstification. The paper evaluates abandoned lands and their reforestation on the example of sunny hillslopes of Horny Vrch plateau and Zadielska plateau from the point of view of the landscape succession during the current century.The rate of potential soil loss is 1.5-5.0 mm.yr(-1) acid the real one 1.4-2.00 mm.yr(-1) The density of various forms of linear erosion is 4.66 km.km(-2). Changes of site conditions due to erosion have been studied on the change of grain and aggregate compositions as well as the water stability of soil aggregates.A special attention has been paid to the vegetation cover of eroded abandoned areas and especially to the analysis of their reforestation. The authors focused especially on the development of 40-year old plantations and indicate further succession of landscape and management of forest stands.