Fertilizer use efficiency under rain-fed agriculture in West Asia and North Africa: proceedings of the fourth regional workshop

abonos fosfatados abonos nitrogenados afrique du nord analyse de sol arid zones chemical soil types cicer arietinum cultivo de temporal culture pluviale feed crops fertilidad del suelo fertilisation fertilizer application hordeum vulgare lens culinaris middle east moyen orient nitrogen fertilizers north africa oriente medio phosphate fertilizers plantas forrajeras soil fertility soil testing triticum aestivum triticum durum type de sol chimique vicia faba zone aride