الفهرس 
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Abstract
Under the experimental and resembling conditions, it is advised to fertilize Sukkary mango trees growing under Aswan environmental conditions with the suitable N (1000 g N/tree/year) via 50% any inorganic N fertilizer + 50% chicken manure + EM, at 50 ml/tree/year. Inorganic N fertilizer was spitted into three equal batches at the first week of March, April and May. Chicken manure was added once after winter pruning. Effective microorganisms was added once at growth start. This recommendation mean that using 50% chicken manure enriched with 50 ml EM can used as a replacement of 50% inorganic N which reflects in avoiding pollution occurred in our environment which appeared in terms of reducing the pulp content of both nitrite and nitrate.