الفهرس 
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Abstract
The present research work aims to studying the effect of three nitrogen levels ( 60, 90; 120 kg/fed) and four wheat cultivars: 1- Sakha 93, 2- Sakha 94, Misr 1, and Gemmeza 9 cultivars on wheat yield, yield components and quality parameters of wheat as a flour source for human nutritions. The field experiments were conducted at National Research Center Research Station, El-Noubaria, El-Behaira Governorate, during the two successive seasons of 2011/2012 and 2012/2013 a factorial including three factors in a completely randomized block design with 3 replicates. Grain yield, 1000 kernel weight and moisture in grain at harvest under (60 Kg/fed), (90 Kg/fed) and (120 Kg/fed) nitrogen treatments increased by (6.7, 5.0; 0.8 %), (6.2, 4.3; 4.9 %) and (5.9, 4.8; 4.6 %), respectively in second season relative to first season. (% net flour, % of grain protein, % of fat, % total sugar and % wet gluten in flour and % dry gluten in flour), nitrogen treatments increased by (1.8, 11.5, 19.7, 30.8, 2.8; 11.9 %), (1.7, 10.4, 20.7, 18.8, 4.5; 9.8 %) and (1.4, 10.7, 9.6, 32.7, 4.6; 10.7 %), respectively in second season relative to first season. Dough period, dough stability, B.U. mixing tolerance, % of water absorption and % of extraction, nitrogen treatments increased by (7.6, 0.9, 2.1, 4.9; 2.8 %), (6.7, 2.3, 1.4, 3.6; 2.1 %) and (3.0, 1.4, 1.9, 3.9; 2.8 %), respectively in second season relative to first season.