Being stated that the nature of public interventions would be decisive for the dynamics of goat projects. 3 types of interventions (liberal, global and local participatory) are developed. For each project a previous analysis of its specific advantages and limits for goats is recommended. Research action and participatory or co-operative methods are recommended for a better impact and success of rural development of dry zones and reduce the climatic uncertainty.
Key words : Research action; arid areas; extension; development; goat; production systems.