الفهرس 
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Abstract
The present investigation was carried out during two successive seasons 2019 and 2020 on twenty four-own rooted uniform in vigor Thompson Seedless grapevines, grown in private orchard located at Kom Al-Zuhair, Abo Kourkas distract, El-Minia Governorate Egypt (280 km southern Cairo city), where the soil texture is clay, since water table depth is not less than one and have meters. The chosen vines are ten years old (at the starting of this study) and planted at 2 X 3 meters apart. However, the winter pruning was followed at the second week of January. However, surface irrigation using Nile water was adopted.
Conclusion: from the results of this study, it is clear that spraying Thompson Seedless grapevines, grown in clay soil under El-Minia Governorate conditions, with vitamin E, citric acid and folic acid as a single or combined application may play a beneficial role in enhancing vegetative growth, leaves chemical composition and yield as well as berries physical and chemical properties. However, spraying the vines with the three antioxidants in combination present the best results concerning: vegetative growth, leaves chemical composition, yield and its components, as well as fruit physical and chemical properties.
It is recommended to spraying Thompson Seedless grapevines grown under this experiment condition and resembling conditions, with the mixture of vitamin E + citric acid + folic acid three times yearly (at grow starting, just after berry setting and one month later), in order to improve the growth and productivity as well as berries physical and chemical properties.