الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
A field survey study was conducted during the two successive winter seasons of (2016/2017 and 2017/2018) near the Factory of Nitrogen Fertilizers and Chemical Industries near Mansoura city, Dakahlia Governorate to evaluate the effect of the factory wastes on some heavy metals (Arsenic, Cadmium, Cobalt and Lead), nitrate and nitrite contents in the edible parts of some vegetables, soil and water. The experimental design was complete randomized design (CRD) with three replications. Samples of three vegetable crops; i.e.; potato, sweet pepper and watercress, soil and water were taken from both sides of the main drainage channel of wastes at three distances at (1, 3 and 5 km) from the factory, besides the control at the opposite direction from the factory.
The study revealed significant effects of some heavy metals (Arsenic, Cadmium, Cobalt and Lead), nitrate and nitrite contents in the edible parts of vegetables, soil and water.
Data obtained in this study, indicated that increasing the distance at (5 km), from source of the pollution increased in the vegetative growth and yield of vegetable crops under study. In the same time, nitrate, nitrite and some heavy metals espeasilly (cobalt and lead) concentrations were increased in the edible parts of the tested vegetables (potato tubers, sweet pepper fruits and watercress leaves) and also in soil and water. This effect may be decrease or fading by increasing the distance from the source of pollution more than that.
Therefore, it could be recommend cultivation in the vegetables at a distance more than (5 km) from sources of the pollution and must be prevent cultivation of vegetables near or round of the different sources of pollution specially factories for nitrogen fertilizers production