“Nutrient Resorption Efficiency of Cocoa Plantson Lowl and of Alluvial Plain”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 28, no. 1 (May 1, 2011): 32–44. Accessed May 1, 2026. https://mail.ccrjournal.com/index.php/ccrj/article/view/.