الفهرس 
مقدمةOnly 14 pages are availabe for public view
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Abstract
This study will deal with hisological effects of cultivars and benefical effects of magnesium(Mg++) salts on vegtetative growth,total leaf pigments,contents,yield,fruit and oil quality of some horticultural plants including olive trees.The following headings will be assessed 1-Magnesium soil content.2-magnesium mode of action.3-magnesium in plants(nutrient status of magnesium in olive trees).4-Effect of cultivars.5-Effect of magnesium.