الفهرس 
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Abstract
This study was carried out in order to evaluate and improve the growth and nutritional value of eight tree species namely, (A. saligna, L.leucocephala, D. regia , E.camaldulensis, M. nigra, C. glauca, F. retusa and F. elastic) developing in Egypt through fertilization and use it in feeding animals and improve digestion process by converting them to silage to provide animals in desert areas with food and soil improvement. The fertilization rate was 250 g urea + 125 g Super calcium phosphate + 125 g potassium sulphate per tree.