Greener Journal of Agricultural Sciences

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Chukwumati and Anozie

Greener Journal of Agricultural Sciences

Vol. 11(2), pp. 126-132, 2021

ISSN: 2276-7770

Copyright ©2021, the copyright of this article is retained by the author(s)








Assessment of Chemical Properties of Soil under the Influence of Spent Motor Oil Remediated with Vetiver Grass (Vetiveria zizanoides) in South –South, Nigeria.



Chukwumati, J.A; Anozie, H.I



Department of Crop and Soil Science, Faculty of Agriculture, University of Port Harcourt, PMB 5323, Port Harcourt, Nigeria.






Article No.: 061821057

Type: Research



The study investigated the physicochemical properties of soil under the influence of spent engine oil (SEO) on cultivated vetiver. Soil samples were sampled in mechanic workshops located in 2 communities: Elikohia and Choba both in Rivers States of Nigeria. Composite samples of spent oil contaminated soils were collected randomly at a depth 0-15, 15-30, 30-45cm from the two sites respectively and uncontaminated samples (control) at 100 meters away from the two sites with spade. Ten (10kg) each of harmonized composite soil samples of contaminated and no vetiver (ctm no vet), contaminated and remediated with vetiver (ctm + vet) and control samples were placed into 10 litre perforated plastic buckets. Two splits of vetiver plant were transplanted per plastic bucket. At the end of three months, soil samples were collected and analysed for physicochemical properties.  Results of the study revealed that contamination of the soil with spent engine oil significantly (P<0.05) increased the soil total organic carbon, total nitrogen and the electrical conductivity of the soil compared to control in all the soil depths investigated, while a decrease in concentration were observed in available phosphorus and exchangeable cations (Ca, Mg and K) in contaminated over control samples. There was consistent decrease in concentration of total organic carbon, cation exchangeable bases available phosphorus and total nitrogen along the soil profile depth. Cultivation of vetiver plant (Vetiveria zizanioides) significantly increased the concentration total nitrogen, available phosphorus, total organic carbon and exchangeable cations and a reduction in electrical conductivity of the soil in both sites (Choba and Elikohia) and along the soil depths. There was no significant (P>0.05) difference between the contaminated and control samples in both sites, however soil contaminated with SEO were slightly higher in Elikohia than those of Choba. The soil pH decreases with depth of soil profile. The study therefore showed that cultivation of vetiver plant in spent engine oil contaminated soil improves the fertility status of the soil.


Accepted:  22/06/2021

Published: 07/09/2021


*Corresponding Author

Chukwumati, J.A

E-mail: johnprint2005@

Phone: +23408063573269



Spent Engine Oil (SEO); vetiver; Soil properties; Elikohia; Choba.




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Cite this Article: Chukwumati, JA; Anozie, HI (2021). Assessment of Chemical Properties of Soil under the Influence of Spent Motor Oil Remediated with Vetiver Grass (Vetiveria zizanoides) in South –South, Nigeria. Greener Journal of Agricultural Sciences 11(2): 126-132.



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