SOIL SURVEY AND CLASSIFICATION IN A COMPLEX TERRITORIAL SYSTEM: RAVENNA (ITALY) RELEVE PEDOLOGIQUE ET CLASSIFICATION DES SOLS DANS UN SYSTEME TERRITORIAL COMPLEXE: RAVENNE (ITALIE) RILEVAMENTO PEDOLOGICO E CLASSIFICAZIONE DEI SUOLI IN UN SISTEMA TERRITORIALE COMPLESSO: RAVENNA (ITALIA).

Within the PRIN 2007-2009 project, "Geochemical balance for the assessment of the agro-environmental quality in a complex territorial system: the case of Ravenna", thirteen profiles have been characterized from a pedologic point of view: nine in a coast pinewood, two in a farm and two in a city park. The profiles have been described, sampled and analysed to the purpose of giving a first outline of the pedologic complexity of areas under examination. Inside the pinewood, soils are remarkably affected by the topographic position and the closeness of the surface aquifer. Typic Ustipsamments correspond to elevated aquifer depths, Typic Psammaquents correspond to limited depths and Aquic Ustipsamments, to intermediate ones. The two farm soils fall within the Udifluventic Haplustepts, with a few distinctions determined by a different utilisation of the soil and by the depositional origin. Also the two soils in the city park fall in the Udifluventic Haplustepts; however, in this case the anthropic interference suggested by the plenty brick fragments detected in the profiles is quite evident. Keyword: soils classification; soil chemistry