"This publication contains five papers on DHP Ethiopia (Aba'ala, Afar Regional State) that narrate and discuss traditional crop production, social relations between lowlanders and highlanders, extension activities on the use of water harvesting and management and the diversion of river (flood water) and its impacts on production. Moreover, field trial results of maize in the drylands of Aba'ala and traditional veterinary practices in the Aba'ala pastoral community are also discussed."