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Cassava has grown and developed from being a minor crop to becoming a major crop consumed by several homes in the country.However,the incessant oil spillage and crude oil pollution has increased the concern on the productivity of this crop in the Niger Delta area.Thus the research was aimed at providing empirical evidence on the actual impact of crude oil spillage in the Niger delta on the soil and productivity of cassava farming.The specific objectives of the study were to assess the socio-economic characteristics of cassava producers in the Niger Delta,evaluate the effects of the crude oil spill on the soil properties and cassava yield in area,compare the difference in yield with communities not affected by oil spill,analyses the efforts of oil companies in the communities and make policy recommendations.The study adopted a mixed research approach that employed questionnaire to gain insight from farmers on the effect of oil spillage on their productivity and a lab test of soil sample for examining the effect of oil spill on soil properties.The m ai n results ar e as fo l l o ws :（1）The study found a net margin of N27,218.17 and N18,382.17 per cassava producer in non-oil and oil spill areas in the Niger Delta Region,respectively.Oil spills have resulted in a 31% fall in cassava producer revenues.According to the test of difference,there is a significant difference of 8,836 in cassava producers’ net margin（i.e.profit）between non-oil and oil spill locations.（2）For oil spill and non-oil spill communities,the yearly fixed cost and total variable cost per hectare cassava grower were N6,799.15 and N19,268.68,respectively.Land,frying pans,diggers,and cutlasses were the most important fixed costs in cassava production,accounting for 34.03%,11.57%,10.82%,and 9.64% of total fixed costs,respectively.Labor,fertilizers,planting supplies,transportation,and processing were the greatest operational cost components,accounting for 22.49%,20.92%,15.76%,14.80%,and 16.24% of total variable costs,respectively.（3）A crude oil spill has a statistically significant impact on cassava yield.Total cassava product（garri）output declined by 16.46% between non-oil and oil spill communities in the research region.（4）Oil contamination changed the physical and chemical features of soil.The oilcontaminated soil p H has plummeted by 23%,while its moisture content has dropped by 60%.The electrical conductivity of unpolluted areas was found to be more than 78%higher than that of contaminated ones.As a result,the soil has become very acidic,compacted,negatively charged（ions）,and dry.（5）Oil firms have distinct corporate social duties in terms of basic social amenities to their host communities.Responses suggest that providing these facilities has much influence on the activities of cassava growers in the study region when compared to the degree of environmental harm caused by crude oil exploration and production operations.