1.      26^th International Course on Vegetable Production, Wageningen, the Netherlands, August to November 1996.

2. Study visit to Uganda-Kenya on organic farming, production, certification and marketing on 19^th –29^th April, 2004 organized by CTA (Netherlands).
3. Research and study visit, 01/07/2004-29/09/2004 Germany funded by DAAD

4.      Refersher Course on Sustainable use and Conservation of Agrobiodiversity, 24 October-5 November, 2005, ILRI, Addis Ababa, Ethiopia.