The role of livestock in smallholder household economy in the mixed crop-livestock farming system of Ethiopia. A case of Lay Armacheo Woreda, North Gondar Administrative Zone, Ethiopia

agriculteur agricultores agroecosistemas agroecosystems ambiente rural animal husbandry cash flow economic analysis environnement rural ethiopia etiopia farm income farm management farmers ganado gestion de l'exploitation agricole hogares households ingreso en efectivo livestock living standards manejo de fincas mixed farming niveau de vie nivel de vida petite exploitation agricole rendement rendimiento revenu de l'exploitation rural environment small farms yields