Towards sustainable agriculture on central and marginal slopes of Wadi El-Natrun depression, Egypt

agricultural resources agricultural soils alluvial soils arid climate arid zones aridoculture atmospheric depressions cartografia cartographie cartography clima arido climat aride desert desertification deserts desiertos deterioro del suelo drought stress dry farming eau souterraine egipto egypt estres groundwater imagerie imagery loam soils marginal land reclamation recursos agrarios remote sensing ressource agricole sandy soils semiarid zones sloping land soil deterioration sol agricole sol alluvial sol sableux sol sablolimoneux sostenibilidad stress suelo aluvial suelo arenoso suelo franco sustainability terre en pente terre marginale terreno en declive tierras marginales zone aride