Two field experiments were conducted during 2009 and 2010
summer seasons at the experimental farm of the Agricultural
Research Center, Sebha branch, Libya. Sebha co-ordinates are latitude:
27◦01N, longitude: 14◦26E and 432 m above sea level. The
soil at the experimental site is sandy (93.9% sand, 4.0% silt and
2.1% Clay). Some physical properties relevant to irrigation in the
experimental site are given in Table 1.