الفهرس 
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Abstract
These experiments were carried out during the two growth seasons of 2010 and 2011 at the Station of Treating Domestic Water at Kafr El-Sheikh to study the effect of irrigation with different sources and levels of treated wastewater and Nile water and plantation in the three types of soils (clay, calcareous, and sand) on the vegetative growth, wood properties, wood anatomy and chemical composition of the leaves, stem and roots, heavy metals accumulation (leaves, stem and roots) by two tree species (Azedirachta indica, L) and (Taxodium distichum, Rich) from 15th March to 26th November for each season.Data can be summarized as follows:
• The treatment of 100% treated wastewater and 75% treated wastewater with the clay soil gave the highest significant values of vegetative growth parameters of Azadirachta indica (Plant height, stem diameter, leaf area, leaves number, of the longest root length, shoots and roots fresh and dry weights). While the low values resulted from using 100% Nile water with the sandy soil, and take wood properties parameters (specific gravity and fiber length) the same trend in both seasons. But the root length was differed in Taxodium distichum which gave high length with 100% treated wastewater with the clay soil and gave low length with 100% Nile water with the calcareous soil in the two seasons.High significant N, P and K concentration in different plant parts (leaves, shoots and roots) resulted from using 100% treated wastewater and 75% treated wastewater + 25% Nile water with the clay soil, while the low values resulted from using 100% Nile water with the sandy soil