[Cooperation agreements and ecological farming from the viewpoint of water management]

agriculture biologique alemania allemagne calidad del agua cap conservation de l'eau conservation de la nature cooperation ecologia ecologie ecology ecosistema ecosystems environmental policies environmental protection europa europe european union germany gestion du sol integrated plant production legislation manejo del suelo nature conservation nitrate nitrates nitratos organic agriculture persistance des pesticides persistencia de los plaguicidas pesticide pesticide persistence pesticides plaguicidas politique de l'environnement pollution protection de l'environnement reglamentaciones regulations residues residuos ressource en eau soil management subsidies subsidios subvention water conservation water quality water resources