الفهرس 
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Abstract
This study was conducted during 2014, 2015 and 2016 seasons on fifty- one uniform in vigour 12- years old Picual olive trees on own rooted in a private orchard located at village number (4), West Samalout, Minia Governorate. The selected trees are grown in sandy soil and planted at 6x6 meters apart. The salinity of the soil and irrigation water were 3000 and 2000 ppm, respectively.
This study was carried out for examining the effect of spraying silicon, selenium, arginine, glutamic acid and soil addition of Humic acid and EM on growth, tree nutritional status, yield and fruit quality of Picual olive trees grown under salinity stress conditions. The selected trees received normal horticultural practices that already applied in the orchard.
CONCLUSION:
Under the experimental and resembling conditions for alleviating the adverse effects of soil and irrigation water salinity on growth, tree nutritional status, yield and fruit quality of Picual olive trees, it is preferable to add humic acid + EM via soil each at 50 ml / tree/year once at growth start (1st week of Mar.) as well as using selenium and silicon via leaves each at 25 ppm three times at growth start (1st week of Mar.), just after fruit setting (mid. Apr.) and one month later (mid. May).