Efficiency of chemical ameliorants for reclamation of bore mud and solonetzic soils of Siberia and Ural

The problem of solonetzic soils fertility is still one of the most important in the country. The areas of Siberia and Ural make up about 10 million hectares. To improve chemical properties of solonetz, chemical method of amelioration is applied. It's possible to use this method on the bore muds. Number of mud storage pits only in Khanty-Mansisk is about three thousand. On Yamal the situation is the same. As ameliorants-coagulants in the conditions of Siberia and Ural their natural reserves, wastes of mining and chemical industry can be used. The method of tubes was used for the comparative analysis of the studied ameliorants. Equal soil and bore mud samples with increasing doses of coagulants allow to assess maximal filterability of solonetz, bore mud and reveal their optimal dose. The studies have shown that choice of ameliorant-coagulant is mostly determined by the chemism of soil and bore mud salinization, and also content of exchangeable sodium in soil adsorption complex. As promising ameliorants-coagulants we should consider the wastes of chemical industry – phosphogypsum, and as raw material of mining industry – gypsum, carnallite, calcium chloride.