الفهرس 
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Abstract
Two field experiments were carried out in El- Serw Agricultural Research station (A. R.C.), Dammieta Governorate, during the two successive seasons of 2004 and 2005 to study the effect of three irrigation intervals i.e. irrigation every 6.9 and 12 recommeended rates 69 kg N/ fed, 69 kg N / fd from farm yard manure, 69 kg N/fed, poultry manure, 69 kg N/ fed from poultry manure + foliar application (Leafdrip NPK 19%) cultivars namely, Sakha 104 and Giza 182.A strip plot Design with four replicates were used. The main results could be summarized as follows: irrigation interval longer than 6 days caused great reduction in plant height, number of panicles/ m2, panicle length, panicle grain weight, 1000- grain weight, number of grains/ panicle, grain yield, straw yield (ton/ fed), hulling percentage, milling percentage as well as protein percentage in both seasons. Rice cultivars significantly differed in studied traits in both seasons. Poultry manure+ foliar application (Leafdrip NPK 19%), exceeded all fertilizer treatments in all studied. Results exhibited that the interaction effect between irrigation intervals in both seasons. These results indicated that Sakha 104 was the most tolerant one to prolonging irrigation intervals in all studied treats and gave the highest grain yield per feddans in both seasons. Compared to poultry manure+ foliar application with Leafdrip NPK 19%) gave the highest grain yield/ feddans in newly reclaimed soils).