1 Department of Engineering and Geology (InGeo), University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, Chieti, Italy. Electronic address: diego.dicurzio@unich.it.
2 Department of Engineering and Geology (InGeo), University "G. d'Annunzio" of Chieti-Pescara, Via dei Vestini 31, Chieti, Italy.
3 Agricultural University of Athens, Iera Odos 75, Athens, Greece.
4 Faculty of Agriculture, University of Zagreb, Svetosimunska 25, Zagreb, Croatia.
5 Soil & Landscape Science, School of Molecular and Life Sciences, Faculty of Science and Engineering, Curtin University, G.P.O. Box U1987, Perth, WA 6845, Australia.