الفهرس 
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Abstract
Two nutrient film technique experiments were conducted at the a private Farm at Borg El Arab Region, Alexandria, Egypt, during the seasons of (2016/2017 and 2017/2018) to study the effect of humic acid on lettuce yield growing under salt stress condition using soilless culture system. The two experiments were laid out in split-plots systems in arandomized complete block design with three replications