In order to determine the effects of the soil erosion magnetic tracer on soil and plants,pakchoi(Brassica chinensis) grown in the pots was exposed to different concentrations of magnetic tracer on basic physical and chemical properties,microbial biomass of soil and on physiological characteristics,yield and quality of pakchoi.The results showed that,compared with CK,the soil pH,EC and available K increased significantly with the application of magnetic tracer,but the applications of available N and P were s...