Field experiment was conducted at EI-Serw Agricultural Research Station
(North of Delta, Egypt) during the 2004 and 2005 summer season. The study is
concerned with the effect of water table levels (40 to 50 cm and 70 to 80 ern),
irrigation water depths (4.5, 9 and 12 cm) and nitrogen fertilizer levels 30,60 and 90 k
N fed:') on rice yield, yield components, amount of applied water, actual
evapotranspiration (ETa), seepage, percolation losses, and water use efficiency. The
early maturing rice cultivar Giza 178 was used in this experiment. A split-split- plot
design with four replicates was used. The results indicated that the highest value of
water use efficiency (WUE) is 0.76 kg grainl m³ for deep water table (70-80 cm),
irrigation water depth 9 cm with nitrogen fertilizer 60 kg fed. ".