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The black-sand deposits are widely distributed alongside the Mediterranean Sea coast from Abu-Quir in the west to Rafah city in the extreme east. It contains, minerals, which is considered as the main source of uranium, thorium, potassium and iron oxides as a heavy and / or radio elements. These elements may be transferred with irrigation water to the plant organ (s), or even prevented the adsorption of nutrients. To achieve this purpose, surface soil samples (0-30 cm.) and subsurface soil samples (30 60cm) were collected from eastern and western of Rosetta area., also Aerva plants samples (roots, stems, leaves and flowers) as a wild plant were collected from these areas to evaluate the object of this study..The results showed highest values of thorium, uranium, potassium and iron detected in soil and plant samples near Rosetta estuary at two sides (eastern and western). The available N. P. K. and Fe in western soil samples were higher than that obtained by eastern soil samples. The N. P. K. content of the plant organ (s) samples that grown at western side were higher than that found the eastern side. The highest thorium, uranium and iron content found in plant root and the least were in the leaves or flowers plants, at two Rosetta sides. Also, total uranium, thorium and iron content in western side were higher than eastern side soil samples. INTRODUCTION The present work was conducted to evaluate the effect of radio elements in the black sands of eastern and western Rosetta branch, Egypt on macro and micro-elements of Aerva plants. The agricultural development represents the main solution for facing the drastic demands for food, all over the world. The development may be occurred through several ways. One of them in the Northern Delta area is raising the soil surface level by adding some sandy layers. These sandy layers most probably will contain black-sand and some wild plants. However, the greatest part of the blacksand was found in Rosetta area, and possibly the largest known accumulations of blacksands on the African coast, (Davidson, 1950). The black-sands contain some heavy and radioactive minerals. The radioactive minerals contain potassium, uranium and thorium. Although, potassium is one of macronutrient for plants was undergoes a simple from radioactive decay. The decay of uranium and thorium proceeds sequentially along a chain disintegrations (IAEA 1979). Uranium content of soil is highly variable with values ranging from 1 to 8 ppm, the average being about 1 ppm, (IAEA, 1988). MATERIALS AND METHODS Twenty soil samples surface (0 – 30 cm) and subsurface (30 – 60 cm.) depths were collected from virgin soil on both eastern and western sides of Rosetta estuary area at distances were 100, 150, 200, 250 and 300 m in both two sides. Also, forty plant samples were ISSN 2314-5609 Nuclear Sciences Scientific Journal vol. 1, p 133 14

EFFECT OF RADIO-ELEMENTS IN THE BLACK SANDS ON WILD PLANT THAT GROWN EASTERN AND WESTERN ROSETTA BRANCH, EGYPT