[1] Univ Palermo, Dipartimento Sci Agr & Forestali, Viale Sci, I-90128 Palermo, Italy
[2] Univ Lyon 1, Ecol Hydrosyst Nat & Anthropises UMR5023, CNRS, ENTPE, 3 Rue Maurice Audin, F-69518 Vaulx En Velin, France
[3] Leibniz Ctr Agr Landscape Res ZALF, Inst Soil Landscape Res, Muncheberg, Brandenburg, Germany
[4] ARS, Northern Plains Agr Res Lab, USDA, Sidney, MT USA