This study was car- ried out to ascertain the practicability of using bioremedi- ated, engine-oil-im- pacted soil for crop cultivation. In this study, bioremedia- tion by land farming and nutrient enhancement was used to treat contaminated soils. In the labo- ratory, soil samples were homogenized, analyzed, and placed into several reactor vessels including a substrate of poultry droppings and cow dung in various ratios to the contaminated soil. During the first phase of the investigation, contaminated soil without treatment served as a control. The soil matrix was homogenized on a weekly basis, and samples were drawn during the third, fifth, eighth, tenth, and fifteenth weeks for total petro- leum hydrocarbon (TPH) reduction and nutrients analysis. The initial con- centrations of TPH were diluted upon the addition of the poultry litter and cow dung substrate. Results obtained during the experi- ment indicate that the amount of nutrients gen- erally decreased as the weeks progressed, and the TPH degradation ranged from 78.27% to 61.84% in the reactor vessels. There was no significant difference (p < .05) in TPH degradation based on the substrate quantities, whereas the TPH reduc- tions in the soil amended with the animal wastes were significantly different from the control sample (soil not amended with animal wastes). Environmental Quality Management / DOI 10.1002/tqem / Winter 2015 / 27 © 2016 Wiley Periodicals, Inc. Published online in Wiley Online Library (wileyonlinelibrary.com) DOI: 10.1002/tqem.21445 Annexing Marginal Soils for Agricultural Cultivation Using an Organic Source of Fertilizer as a Bioremediation Treatment Option Reclaiming Hydrocarbon- Contaminated Land for the Cultivation of Food Crops Adams Oshobugie Ojor and Adams Omokhagbor Godleads