John, Kingsley, and Ackley Ufot Akpan-Idiok. 2019. “Land Evaluation, Characterization and Classification of Soil for the Proposed Oil Palm Plantation in Ekpri Ibami, Akamkpa Local Government Area, Nigeria”.
International Journal of Environment, Agriculture and Biotechnology 4 (3).
https://journal-repository.com/index.php/ijeab/article/view/339.