IJAH, C. J.; EKPO, H. J.; EKWERE, P. A. Potassium Fixation on Soils Formed from Diverse Parent Materials in Akwa Ibom State. Direct Research Journal of Agriculture and Food Science, [S. l.], v. 13, n. 2, p. 73–81, 2025. Disponível em: https://journals.directresearchpublisher.org/index.php/drjafs/article/view/16. Acesso em: 1 may. 2026.