الفهرس 
Effect of irrigation systemsOnly 14 pages are availabe for public view
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Abstract
Two field experiments were conducted during the two successive seasons of 2007 and 2008 at Sakha Agriculture Research Station, Kafr El-Sheikh Governorate . This research are to study: Effect of different irrigation systems on irrigation efficiencies. Calculating the amount of water saving. Effect of different irrigation systems on the yield of wheat and maize as well as water use efficiency. Determination of nitrogen use efficiency under different irrigation systems. The experimental design was split plot design, main plots were devoted to irrigation treatments which included six types. I1 = Surface irrigation (SI). I2 = Semi portable sprinkler. I3 = Minisprinkler. I4 = Floppy sprinkler. I5 = surface drip. I6 = sub surface drip. Sub plots were assigned to nitrogen fertilization treatments N1=100 % of commended doses which equls 75 and 120 kg N/fed for wheat and maize respectively . N2=The same rate for both crops added through irrigtion water as fertigation . N3=75% of recomended doses was added by fertigation and the rest (25%) as a soil addition for both crops . N4=50 % of recomended doses was added by fertigation and the rest (50%) as a soil addition for both crops . N5=25 %. of recomended doses was added by fertigation and the rest (75%) as a soil addition for both crops. The main Results could be summarized as follows to obtain an economic yield , high net return per each unit of applied irrigtion water as well increasing water saving in the heavy clay soils of the North Nile Delta , it is advisable to use minispeinkler with nitrogen fertigation , net return of L.E 1.62/m3 water for wheat crop could be achieved . Regarding maize crop , surface drip irrigation along with nitrogen fertigation , net return of L.E 0.62/m3 water could be obtained . To control soil salinity at the safe level , one flood irrigation should be added after crop harvesting .