The tests were carried out on a flat soil, classified as asilty-clay (clay 54.3, silt 43.4, sand 2.3%) according to the United StatesDepartment of Agriculture (USDA) soil classification system (USDA,2014), at the experimental farm of Consiglio per la ricerca in agri-coltura e l’analisi dell’economia agraria, Unità di ricerca per l’ingegne-ria agraria(CREA-ING) in Monterotondo (Rome, 42°5’51.26” N,12°37’3.52” E; 24 m a.s.l.)