Effect of irrigation development on household income and food security. A case study of Gum-Selasa irrigation scheme, Tigray, Ethiopia

actif activo agriculteur agricultores agricultura de regadio assets conduite de la culture cost benefit analysis crop management crop yield crops cultivos ethiopia etiopia existencias de alimentos farm income farm inputs farmers food security food stocks hogares households insumos agricolas irrigated farming irrigation irrigation methods irrigation schemes manejo del cultivo moyen de production agricole plant production plante de culture rendement des cultures rendimiento de cultivos revenu de l'exploitation riego seguridad alimentaria stock alimentaire