الفهرس Only 14 pages are availabe for public view
 |  | from | 141 |  |  |
| | | from | 141 | | |
Abstract
The purpose of the current study is to realize the balanced fertilization using combinations of mineral commericial nitrogen fertilizers with sewage sludge in comprasion with farm yard manuare as acommon organic fertilizer. The combinations of mineral and organic fertilizers were applied to three different types of egyptian soils i.e including desert soils (sandy and calcareous soils) and alluvial clay soils from delta Nile river to asses the alteration of their fertility and productivity. Distribuation of essential and non-essential trace elements in plant tissues and soils were determined to evaluate the effect of using organic and inorganic manuare combinations on soil polluation as well as accumulation in the food chain.