African Journal of Agricultural Research
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Article Number - 439213B65889

Vol.12(36), pp. 2742-2753 , September 2017
ISSN: 1991-637X

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Full Length Research Paper

Phosphorus fixation and its relationship with physicochemical properties of soils on the Eastern flank of Mount Cameroon

Kenneth Mbene
  • Kenneth Mbene
  • Department of Chemistry, Higher Teacher Training College, University of Yaounde 1, P. O. Box 47, Yaounde, Cameroon.
  • Google Scholar
Aaron SuhTening
  • Aaron SuhTening
  • Department of Agronomic and Applied Molecular Sciences, University of Buea, P. O. Box 63, Buea, Cameroon.
  • Google Scholar
Cheo Emmanuel Suh
  • Cheo Emmanuel Suh
  • Department of Geology, University of Buea, P.O. Box 63, Buea, Cameroon.
  • Google Scholar
Norbert Nkafu Fomenky
  • Norbert Nkafu Fomenky
  • Department of Chemistry, University of Buea, P. O. Box 63, Buea, Cameroon.
  • Google Scholar
Vivian Bih Che
  • Vivian Bih Che
  • Department of Geology, University of Buea, P.O. Box 63, Buea, Cameroon.
  • Google Scholar

 Received: 20 June 2017  Accepted: 04 July 2017  Published: 07 September 2017

Copyright © 2017 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0

The Eastern flank of Mount Cameroon is made up of human settlement and agricultural activities. Determination of phosphorus (P) fixation characteristics of soils around this region is important for a clean environment and economic fertilizer application. The objectives of this study were to evaluate P-fixation characteristics of soils within the region and identify factors contributing to P-fixation. Composite surface soil samples from five sites (between 36 to 1006 m) were collected and analyzed for physicochemical properties and P-fixation capacity. Fixation data were obtained by equilibrating the five soil samples with 25 ml of KH2PO4 in 0.01 M CaCl2, containing 0, 10, 50, 100, 250 and 500 mg L-1. Phosphorus-fixation data were fitted to Langmuir and Freundlich adsorption models and the relationship between P-fixation and soil properties was determined. The adsorption maximum (KL) for Freundlich model was the highest for Limbe - Man O’War Bay Road (LMR, 174.58 mg P kg-1), followed by SLR (34.12 mg P kg-1), Dibanda-Mutengene Road (DMR, 24.72 mg P kg-1), VAS and UPD (16.87 mg P kg-1). The Langmuir adsorption maximum for Vasingi (VAS), Upper Boduma (UPD), Sasse-Limbe Road (SLR), DMR, and LMR were 0.01, 0.02, 0.01, 0.02 and 0.05 mg P kg-1, respectively. The phosphate adsorption isotherm gave good fit adopting Freundlich (r = 0.98 to 0.99). KF correlated with pH (r = - 0.87), Ca (r = - 0.87), exchange acidity (r = 0.87), and clay (r = 0.67). This study illustrated that P sorption isotherm in relation to soil properties can be used as a tool for P management in sustainable crop production.


Key words: Phosphorus fixation, adsorption isotherms, soil physicochemical properties, volcanic soils, Mount Cameroon.

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APA Mbene, K., SuhTening, A., Suh, C. E., Fomenky, N. N., & Che, V. B. (2017). Phosphorus fixation and its relationship with physicochemical properties of soils on the Eastern flank of Mount Cameroon. African Journal of Agricultural Research, 12(36), 2742-2753.
Chicago Kenneth Mbene, Aaron SuhTening, Cheo Emmanuel Suh, Norbert Nkafu Fomenky and Vivian Bih Che. "Phosphorus fixation and its relationship with physicochemical properties of soils on the Eastern flank of Mount Cameroon." African Journal of Agricultural Research 12, no. 36 (2017): 2742-2753.
MLA Kenneth Mbene, et al. "Phosphorus fixation and its relationship with physicochemical properties of soils on the Eastern flank of Mount Cameroon." African Journal of Agricultural Research 12.36 (2017): 2742-2753.

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