الفهرس 
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Abstract
Two studies were carried out at two loctions: 1/greenhouse experiment at desert research center, el- mataria, cairo, egypt in 1996 on four tomato cultivars(edkawy, super marmande, castle rock and peto 86) these cultivars were irrigated with different salinity levels (2000,4000,and 6000 ppm nacl as well as tap water as a control) and were treated with the plant bioregulator.