The area is represented by a single relief unit, the plain, which has the aspect of a wide alluvial area of subsidence and divagation, on which parasite numerous abandoned waterbeds representing the old water courses of the river Aranca and of its affluents. The impact and action in time of soil and climate factors (relied, rock, clime, hydrology) as well as man’s intervention through important hydro-ameliorative works started more than 200 years ago, determined the existence itself of a cover of soils with strong complexity and diversity.

limiting factors; salinisation; humus reserve; compactness; moisture excess

Presentation: oral