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ABSTRACT
Soil pollution due to oil spill is a common problem in the South south region of Nigeria. This necessitated the experiment to determine the effect of diesel oil pollution on some soil properties in Benin within Edo state region of Nigeria. The experiment was conducted at the Splendid-stan research laboratory ltd, 100 new Lagos road, Iguosa, Benin City. Soil sample was gotten from an affected area in Osasogie Egor local government area of Benin, Soil class; Sandy loam. Three types of soil were tested after sieve analysis was carried out and they include; Sandy soil(70%),Clay soil(5%),Silt soil(25%). 1 Litre of diesel oil was used to carry out the test and the effects at 0%,2%,5%, and 8% were obtained. The results at two weeks after oil application showed significant decrease in soil pH from 5.90 in the control to 5.8 in 8% pollution levels resulting in soil reaction being rated as extremely acid in oil polluted soils compared to the control with soil/reaction being rated as very strongly acid. There was increase in organic carbon and organic matter pollution level at 8% from 5.69 at 0% for organic carbon to 8.95 at 8% and for organic matter at 9.8 at 0% to 15.4 at 8%. There was also depletion in electrical conductivity from 5.6 at 0% to 4.8 at 8%, bulk density from 1.33 at 0% to 0.96 at 8%, an increase in porosity from 49.81 at 0% to 63.77 at 8%, the water holding capacity increased from 42 at 0% to 64 at 8%.
