Beryllium-7, a cosmogenic nuclide, has stable sources in origin and half-life of 53.3 days, which provide essential conditions as a geochemical tracer for seasonal particle transport in the environment. A major portion of ⁷Be (about 95%) in the soils is bound to organic, Fe-Mn oxides and residual fractions. It can be removed with soil particle transport and be used to trace suil erosion. The characteristics of ⁷Be vertical distribution in the soil profiles provide sufficient evidence for trace of seasonal particle transport. ⁷Be inventory, apparent activity and maximum penetrative depth in soil cores as well as relative erosion or accumulation rate can be taken as trace parameters for sail ernsion.