1. Adjei‐Gyapong T. &Asiamah R. D.(2002).The interim Ghana soil classification system and its relation with the World Reference Base for Soil Resources. InQuatorzième réunion du Sous‐Comité ouest et centre Africain de corrélation des sols(pp.51–76).Rome:FAO.
2. Pilot‐scale study of phosphorus recovery through struvite crystallization‐examining to process feasibility;Adnan A. D.;Journal of Environmental Engineering and Science
3. Afari‐Sefa V. Kwakye P. K. Okae‐Anti D. Imoro A. Z. &Nyamiah M.(2004).Potassium availability in soils: Forms and spatial distribution.Vienna:International Atomic Energy Agency.
4. Factors influencing soybean production and willingness to pay for inoculum use in Northern Ghana;Aidoo R.;American Journal of Experimental Agriculture,2014
5. Alves B. J. R. Zotarelli L. Boddey R. M. &Urquiaga S.(2002).Soybean benefit to a subsequent wheat crop in a cropping system under zero tillage (IAEA‐CSP–11/P).Vienna: International Atomic Energy Agency.