الفهرس 
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Abstract
Two field experiments were carried out at the Agric. Experimental Station, Faculty of Agric., Mansoura University, Eygpt during the two growing seasons of 2007-2008 and 2008-2009, aiming to evaluate botanically two newly tomato genotypes grown under shading and wastewater of El-Delta company of fertilizers and Talkha electricity generation mixed with sewage of the vicinity villages, at Dakahlia Governorate, Egypt. Tomato cultivation was performance in an intercropping pattern with maize as a shading agent. The fresh water was obtained from the river Nile located at the same site, and used as a control.
Two newly tomato genotypes were chosen Cheyenne (E 448) FI hybrid and GS 12 F1 hybrid respectively. Three levels of wastewater were examined denoted fresh water, 50% wastewater and 100% wastewater. Two intercropping pattern were used; tomato was cultivated either pure or as associated with maize; Bachaier, B single cross cv. The experiments were laid out in a split split design with three replication for each treatment. The treatments represent combinations of two tomato genotypes, three wastewater levels and intercropping pattern comprised 12 treatments. The tomato genotypes were arranged in the main plots where irrigation levels and cropping pattern were assigned at random in the sub and sub-sub plots respectively. All main effect of genotypes, wastewater, intercropping pattern and their interactions on certain growth and morphophysiological characters as well as yield and its components of tomato were analyzed statistically, presented and discussed. It could be concluded that, although no guideline is available for using wastewater in the irrigation for agriculture purpose, there is an important to testing wastewater microbiologically in a further investigation. Microbes quality of wastewater, the presence of protozoan cysts and other pathogenic microbes as well as heavy metals may be helpful. However, wastewater being used as an alternative source of irrigation for agriculture purpose as well as a common and good resource of nutrients and water. It necessary used in Egypt and other poor countries where chemical fertilizers are not easily available due to their import and because of their high cost which is normally beyound the reach of common poor small farmers. It may be recommended to be used for irrigation fodder crops, pasture crops and vegetables which are used only after cooking. Careful handling and proper washing of the vegetables irrigated with it must be taken up before marketing, using and cooking. The data in the present investigation proved that all growth parameters studied, flowering as well as yield and its components were improved both tomato genotypes due to wastewater applications especially at 50% level. Shading with an intercropping pattern showed an addition effect in this respect during summer cultivation in the two growing seasons.