The Joint Research Unit Soil, Agro- and Hydro-systems, spatialization (UMR SAS) is established in Rennes. This unit focuses on the interactions between agriculture and the environment using a integrative and spatialized approach of rural areas. The main interests are water, nitrogen carbon and phosphorus cycles in cultivated landscapes, as well as multi-criteria assessment of agrosystems. Its research contributes to elaborate sustainable agricultural systems, to improve rural landscape management, to preserve natural resources such as water, soil, atmosphere and landscape quality.