Document Type : Original Article
Authors
1 قسم الانتاج الحيواني - کلية الزراعة بالقاهرة - جامعة الأزهر
2 Alazher Univercity- faculaty of agriculture
3 Al-Azhar university – Faculty of agriculture – Animal Production Depart,emt
4 city of scientific research and tecnological applications alexandria
Abstract
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