engleski

Characteristics and classification of urban soils in the city of Sisak, Croatia

City of Sisak is characterized by continuity of urban living for more than 2000 years. Significant portion of its urban area is occupied by land used for parks, playgrounds, smaller agricultural plots, etc. The aim of this paper was to present the characteristics and classification of urban soils in Sisak, according to Croatian Soil Classification (CSC) and WRB, on the basis of three soil profiles. Urban soils in Croatia were mainly systemized into the class of Technogenic soils, as Deposol soil type. However, in some of those soils, it is possible to detect evidence of ongoing pedogenetic processes, resulting in further soil development. In two of the three investigated soil profiles, pedogenesis led to formation of a humus accumulative horizon. Since in CSC this horizon is diagnostic for the class of Humus accumulative soils, we classified these soils as Rendzinas on deposited land material. According to WRB, one of these soils was classified as Urbic Technosol (Calcaric, Humic, Skeletic) and the other as Endostagnic Regosol (Hypereutric, Siltic, Transportic). In only one of the three investigated soil profiles, the organic matter in the surface horizon has not accumulated mainly as a result of natural pedogenesis. This profile featured a nylon film below the artificially formed humus rich surface layer, and was classified as Deposol on land material, according to CSC, or as Linic Technosol (Calcaric, Ruptic, Siltic), according to WRB. Finally, the recommendations for division of Deposols, as well as Rendzinas on land material, to lower level units are given.

Sisak; urban soils; Croatian Soil Classification; WRB

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