[The first annual technical report of west/east project for second period to improvement animal and plant production systems in arid zones]. [Arabic]

agricultural population animal production arid zones cantidad de semilla requerida crop yield development projects environmental factors extension extension activities facteur du milieu factores ambientales feed legumes herbicidas herbicide herbicides hordeum vulgare leguminosas forrajeras ovin ovinos performance de reproduction plant production population agricole production animale proyectos de desarrollo rendement des cultures rendimiento de cultivos reproductive performance reproductividad sheep siria sowing rates suplementos supplements syria syrie variedades varieties vulgarisation zone aride