• Dr. Christian Ahl
  Soil Hydrology Division, Faculty of Agriculture, Georg-August Universität Göttingen, Göttingen, Germany
  Tel: +49 (0) 551 39 55 04, E-mail: cahl@gwdg.de
• Dr. Abdelmoniem Elamin Mohamed
  Department of Agricultural Engineering, Faculty of Agriculture, University of Khartoum, Khartoum, Sudan.
  Tel: +249-1223, E-mail: moniem1591@yahoo.com
• Dr. Omer Ahmed Abdalla

Department of Agricultural Engineering, Faculty of Agriculture, University of Khartoum, Khartoum, Sudan.
Tel: +249-122459559, E-mail: omerabdalla65@yahoo.com