1. Dep. of Soil Amelioration, Faculty of Agriculture; Univ. of Zagreb; Svetošimunska 25 10000 Zagreb Croatia
2. Research Area 1 “Landscape Functioning”; Leibniz Centre for Agricultural Landscape Research (ZALF); Eberswalder Strasse 84 15374 Müncheberg Germany
3. Institute of Earth and Environmental Science, Univ. of Potsdam; Potsdam Germany