الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
This investigation was conducted over a period of two years starting in fall 1972 on thirteen-year-old balady orange and Valencia orange threes,budded on sour orange rootstock and planted at 6 meters apart, growing at an orchard located at side horticulture research station ,beni swiff governorate ,Egypt, this experiment was arranged in a factorial combination in completely blook randomized design with four replications to study to the influence of some different levels of nitrogen on total nitrogen in the levels ,the yield and quality of balady and Valencia orange fruits regarding fruit weight and volume…