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Soils of the southern region of Chad are developed on wind-drawn sand and colluvio-alluvium deposits of two main rivers Logone and Chari. This region of Chad is principal agricultural zone of Chad. Evaluation of physical and chemical properties of sandy soils and their fertility in this region revealed that some soils have very high content of strontium. With aim to locate areas with high content of srontium in soil, and to study its dependence on physical properties of soil and translocation of strontium in soil profile nine pedons were dug on different fields intensively used for agricultural production. Using X-ray spectrometric analysis and radiometric measuring of soil samples it has been revealed that Sr content in soil samples varies from 10 to 270 mg/kg of soil depending on type of soil, depth of soil layers, clay and organic content. Strontium content negatively correlates with total content of calcium and phosphorus in layers of soil. Low CEC of soil may be a reason of translocation of strontium from higher to lower layers of soils. Strontium content in soils do not relates with level of radioactivity of soils under study. The highest content of strontium has been found in soils developed on colluvio-alluviumdeposits. Very wide Ca/St ratioin soil samples of alluvial hydromorphic soils may cause increase of Sr content in vegetable food and drinking water. This may be one of etiological factors which directly or indirectly may cause misbalance in mineral nutrition and severe diseases of a man. It worth of considering necessity of further studies of Sr dynamic in soils under different crop production systems and how to mitigate negative effect of natural pollution of soils with this element.

About the authors

Victor Dmitrievich Nagornyy

Scientific Research Institute of Design “Vid Project”

Author for correspondence.
Email: nagvic@yandex.ru
1/2, Vidnoe, 142701, Russian Federation
Doctor of Agricultural Science, professor, Scientific Research Institute of Design “Vid Project”

Koi Kamssou

Scientific Research Institute of Design “Vid Project”

Email: kamssou85@gmail.com
1/2, Vidnoe, 142701, Russian Federation
associated Scientific Research Institute of Design “Vid Project”

Marina Ustimovna Lyashko

Scientific Research Institute of Design “Vid Project”

Email: lyashko.mar@yandex.ru
1/2, Vidnoe, 142701, Russian Federation
Candidate of Biological Science Scientific Research Institute of Design “Vid Project”


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Copyright (c) 2018 Nagornyy V.D., Kamssou K., Lyashko M.U.

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