1. Anda, M., Shamshuddin, J., Fauziah, C. I., & Syed Omar, S. R. (2009). Dissolution of ground basalt and its effects on an Oxisol chemical properties and Cocoa growth. Soil Science, 174, 264–271.
2. Atser, G. (2007). Nigeria plans to reclaim its leading position as the world’s largest producer of palm oil that it lost to Malaysia over three decades ago. The punch Publishing Co, October 2nd, (pp. 26).
3. Azura, A. E. (2012). Improving the fertility of an acid sulfate soil in Merbok, Kedah, Malaysia for Rice Cultivation, MS thesis, Universiti Putra Malaysia (unpublished).
4. Dublin-Green, C. O., Ayinla, A. O., & Ogori, T. K. (2003). Management of fish ponds built on acid sulfate soils in Buguma creek, Niger Delta, Nigeria. Journal of Applied Sciences and Environmental Management, 7(2), 39–43.
5. Ibitoye, O. O., Akinsorotan, A. O., Meludu, N. T., & Ibitoye, B. O. (2011). Factors affecting oil palm production in Ondo state of Nigeria. Journal of Agriculture and Social Research, 11(1), 97–105.