Crucial soil nutrient properties were investigated in interplanted cocoa and kola plots of farmers and at the Cocoa Research Institute of Nigeria, both in the major cocoa and kola belt of Nigeria. The results show that soil productivity is highly enhanced by a specific planting arrangement in which utter components of cocoa and kola intermix for a synergistic relationship; this leads to a higher level of organic matter content. The study implies that peasant farmers could be advised on the specific pattern of interplanting their cocoa farms with kola, and that they would no longer require chemical fertilisers and mulches to improve soil fertility under cocoa and kola.