The soils elemental composition of vertical zonality of the Western Tien Shan

The elemental composition allows to obtain information about the principles of humic acids structure, some of their properties, as well as to identify chemical changes and processes occurring in the process of humification. Studies of the elemental composition of humic acids of the main types and subtypes of soils of the vertical zoning of the Western Tien Shan show that the carbon content in them increases from grey soils to mountain brown soils. the low carbon content in the series is accompanied by a narrow C:N ratio, which indicates a smaller condensation of the aromatic carbon grid and the severity of the side chains. The atomic ratio of C:N in humic acids of soils of the Western Tien Shan is 11-25. The narrowest ratio of C:N is observed in sierozems, and the transition from them to brown this ratio expands.