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New farming systems are researched and evaluated in terms of sustainability, including in particular the management of environmental risks.

It is about the design and control of the animal housings, the animal manure management, vegetable production systems or meadows.

The soils and water quality is analyzed. The soils, hydrological operation, the landscape mosaic of the agricultural basins slopes condition the modes and transfer time of water and chemical element, their biogeochemical storage and their transformation within the catchment area.

To understand and envisage the impacts of the agricultural activities and the landscape structures on water quality, the unit carries out research on the hydrological operation of the area catchment and the transfer ways of the chemical elements, like on biogeochemical cycles and theur coupling with the hydrological processes. Nitrogen was the subject of many research and of the transfer models and nitrogen transformation were developed. More finalized works were completed on the pesticides. The transfer of phosphorus is also approached, as well as the origin and the dynamics of the suspended matter.

(http://www7.rennes.inra.fr/umrsas_eng/)