A. M. ABU-RAYYAN, Faculty of   Department of Horticulture and Crop Science University of Jordan, Amman-11942, Jordan. His international experience includes various programs, contributions and participation in different countries for diverse fields of study. He is the Member of the Scientific / Professional Organizations. His research interests reflect in his wide range of publications in various national and international journals 

 Green bunch Onion, Nitrogen Doses, Plant Population