الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
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Abstract
SUMMARY AND CONCLUSION
from the first experiment which carried out in the Soil and Water Research Department, Nuclear Research Center, located at Inshas, Atomic Energy Authority, Egypt. Active single slope solar still coupled with heat pipe evacuated tubes collector by heat exchanger and passive single slope solar still were installed under the climatic conditions of this certain region. To study the effects of solar radiation and ambient temperature on both performances. The most important results is that the average of water temperature and productivity reached the highest values in active solar still 80°C and 3100 ml/m2, respectively under 1093 W/m2 and 49.1°C. Whereas active solar still increased by 37% in productivity and 7% in water temperature than passive solar still.
from the second experiment which carried out in solar energy application laboratory, Agricultural Engineering Department at Faculty of Agriculture, Ain Shams University, Egypt. Active single slope solar still coupled with U pipe evacuated tubes collector by heat exchanger and passive single slope solar still were installed under the climatic conditions of this certain region. To study the effects of solar radiation and ambient temperature on both performances. The most important results is that the average of water temperature and productivity reached the highest values in active solar still 78.3°C and 3120 ml/m2, respectively under 1031 W/m2 and 42.6°C. Whereas active solar still increased by 39% in productivity and 10% in water temperature than passive solar still.
Distilled water obtained from the previous system and mixed it with the saline water to reduce salinity from the water to use the suitable water to irrigate green bean plants in pot experiment under three water regimes (100%WHC), (80%WHC) and ( 70% WHC). In the present study conducted in green-house under Egyptian conditions using sandy soil as media for green bean plant cultivation, the obtained results elucidated that irrigation of green bean plants with desalinized water at full water requirement (T1, 100% WHC) had improved the growth traits and green pod yield as well as enhancement of water productivity and water use efficiency in comparison to different deficit water regimes, i.e. T2, 80% WHC and T3, 70% WHC. Similarly, NPK nutrients uptake by different plant parts were improved by increasing irrigation water availability to plants. Application of stable nitrogen isotope gave us the opportunity to estimate accurate amounts of N derived by plants from chemical fertilizer added and indicated that fertilizer-N was highly accumulated in pods followed by shoots while those detected in roots was negligible. It proves that most nitrogen gained from fertilizer was mobilized to upper plant parts. Therefore, it was clear that fertilizer-N was more efficiently used by pods rather than shoots. This was true under all irrigation water regimes. Finally, due to nearly closed data of T1 and T2 regimes in most cases, we can recommend T1, 100% WHC water regime because of pods productivity.
The relevant conclusions of the study as follows:
• In active solar still higher distillate in productivity and water temperature could be achieved compare to passive solar still due to the use of heat pipe ETC.
• In active solar still higher distillate in productivity and water temperature could be achieved compare to passive solar still due to the use of U pipe ETC.
• There is a statically significance between (100%, 80% and 70% WHC) water treatment in water use efficiency and water productivity.
• There is no a statically significance between (100% and 80% WHC) water treatment in NPK uptake by plant in shoot, root and pods.