Note: HDM, the soils in oculate hydrocarbon-degrading microorganisms. Data Indicate that diesel pollution decreased due to bioremediation. Decrease of diesel in the control is the result of evaporation and biodegradation by inherent microorganisms .Each datum represents the mean S.D. of three replicates. The statistical significance of removal ratio between control and HDMs was represented.(*Po0.05, **Po0.01.)