الفهرس 
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Abstract
The purpose of this research was to study the effect of irrigation on flowering, physiological aspect, physical and chemical qualities of fruits, yield and vegetative growth of Thompson seedless grape. moreover, the effect of irrigation on the chemical compounds in shoots and leaves was also included. The results obtained from this study could summarized as follow : A- Results on flowing a) Time bud burst and blooming date. 1- No great difference in dares of bud burst due to the differences treatments were noticed but the buds breaked earlier in the first season than in the second one. 2- Also no great varieties between practices concerning blooming date. D) bud burst and fruit full buds percentage. 1- vines irrigated 5 to 7 times gave the highest bud burst percent. The increase was signification. The least percent of bud burst was found in vines irrigated 3 times only. 2- Here also the highest number of the fruit full buds was gained from vines irrigated 5 times or more.