Two field experiments were carried out at Kafr El -Sheikh Governorate during summer season of 2011 , the first one was conducted in Sakha farm ( Normal soil ) , while the second experiment was conducted at El-Hamoul district ( saline soil ) . Splitsplitplot design with three replicates was used. Where, the main plots were assigned to irrigation timing (15, 26 and 36 days) after life watering and then maize plants were exposed to depletion (20, 40 and 60 %) from available water. Sub plots were

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... voted to nitrogen fertilizer levels i.e. 0, 80, 100 and 120 kg Nfed -1 . , and the subsubplots were occupied to compost treatments i.e. without and with compost application (3 ton fed -1 ). Results indicated that , under normal soil conditions , the highest value of water productivity was obtained by irrigation after 36 days after life watering followed by irrigation at 60 % depletion from available water as well as adding both compost and 120 kg Nfed -1 . While , in saline soil the highest value of water productivity was achieved by irrigation after 36 days after life watering followed by irrigation at 20 % depletion from available water in addition to compost and 120 kg Nfed -1 .