الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
important cereal crop which is used in human food , therefore more investigations were carried out to maximize production through releasing new cultivars , studying the optimum nitrogen levels, the seeding rates and so on . Treatments in the experiments included recent wheat cultivars ( Sakha 69 , Sids
1 and Sids 7 ) , seed rates and nitrogen levels . Agronomic traits of the canopy included measurements at different developmental stages , i. e. plant height , number of different plant organs , dry weight of different plant organs , heading , spike filling , physiological growth parameters , yield and yield components . Significant differences between seeding rates , nitrogen levels treatments in growth , yield and yield attributes were shown but no significant differences were obtained in physiological growth parameters and the interaction between seeding rates and nitrogen levels .