ABSTRACT
Geology exerts a fundamental control on concentrations of soil selenium (Se), which influenced the human dietary Se intake (Fordyce 2013). Researchers have tried to solve the uncertainty about nutrient content in soil and its connection to bacterial strains, competitive ions, organic matter (OM), pH, and redox status, as well as dry and harsh climate, evapotranspiration, precipitation, temperature, land use type, and topography (Xu et al. 2018). The influential topographic factors and their relationships with nutrients in soil have been widely studied (Li et al. 2017). However, there are few studies on dry topographic effect on Se distribution in soils. Hence, the present study was based on studying the relationship between dry soil and Se concentrations in the Northwest region of China.
