Indigenous agroforestry systems in southern luwero district Uganda and their potential in agricultural development [Canarium schweinfurthii, MUGAVU, MUTUBA]

agroforesteria agroforesterie agroforestry albizia arbre bois canarium cropping systems cycling erosion farm inputs fertilidad del suelo insumos agricolas land use madera moyen de production agricole ouganda silvopastoral systems sistemas de cultivo soil fertility trees uganda utilisation des terres wood