Making every drop count: the OSWU approach

afrique du nord arid zones asia occidental asie occidentale conduite de la culture crop management cropping systems cultivo de temporal culture pluviale disponibilidad del agua eau disponible efficiency eficacia fertilidad del suelo gestion des eaux gestion du sol international cooperation international organizations land management lluvia manejo del cultivo manejo del suelo middle east moyen orient north africa organisation internationale organizaciones internacionales oriente medio plant production plant soil relations plant water relations pluie rain rainfed farming relaciones planta agua relaciones planta suelo relation plante eau relation plante sol semiarid zones sistemas de cultivo soil fertility soil management uso del agua utilisation de l'eau water availability water management water use western asia zone aride