الفهرس 
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Abstract
Nitrogen sources had beneficial effect on wheat yield,but part of nitrogen added to the soil is subjected to the loss The lost part caused environmental pollution which is dangerous to human health and leads to high cost of wheat production.Splitting nitrogen rate on wheat yield and yield components is an interest subject which needs more research work under different conditions i.e salt affected soils.Therefore the main target of this is directed to wheat yield and its components as well as splitting nitrogen fertilizers technique on wheat yield.