1. Abekoe, M.K., 1996. Phosphorus fractions and rock phosphate transformations in soils from different landscape positions from northern Ghana. PhD Thesis, Univ. of Saskatchewan, Saskatoon, Canada.
2. Abekoe, M.K., Tiessen, H., 1998a. Phosphorus sorption by lateritic nodules in soils from hillslopes of northern Ghana, submitted.
3. Abekoe, M.K., Tiessen, H., 1998b. Fertilizer P transformations and P availability in hillslope soils of northern Ghana, Nutrient Cycling in Agroecosystems (in press).
4. Factors influencing the status of phosphorus in surface soils of Ghana;Acquaye;Ghana J. Agric. Sci.,1972
5. Adu, S.V., 1952. Detaileed soil survey of the central agricultural station, Nyankpala, Ghana. Department of Soil and Land-use Survey, 27 pp.