Assessment of soil properties and trace element accumulation in arid regions: A case study of Kalmykia's central dry steppe zone, Russia oleh Raisa Mukabenova, Saglara Mandzhieva, Vishnu D. Rajput, Aleksey Buluktaev, Inna Zamulina, Altana Adyanova, Nikita Dzhimbeev, Vasiliy Sayanov, Sudhir S. Shende, Anatoly Barakhov, Svetlana Sushkova