الفهرس 
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Abstract
A field experiment was carried out during the two seasons of 1983/84 and 1984/85 at the Experimental farm, Agriculture Research station at Mallawi, El-Minia A.R.E.
The aim of this work was to study the optimum N and P Fertilization levels for producing the greatest grain yield from the unit area and subcequently the interrelationship between Fertilization levels and cultivars of wheat.
A split plot design with four replications was applied. Wheat cultivars were arranged randomly in the main plots, while the combinations of N and P were allocated randomly in the sub-plots.