الفهرس 
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Abstract
Animal production in Egypt is still confronting several factors, the most limiting being feed shortage. In order to correct the feed balance in Egypt, a number of the agricultural by-products can be utilized in animal feeding. furthermore, the nutritive value of these by-products can be improved by chemical treatments. the present experiments were therfore conducted in order to study the effect af acid treatment on the nutrative value of agricultral by- products such as rice hullsas rice huils peanut hulls saw dust, dete stones and cotton by -products will help inthe development of animal feed resources in EGYPT.