Eroded savanna soils of the Navrongo-Bawku area, northern Ghana
1972
Adu, S.V., Soil Research Institute, Academy Post Office, Kwadaso, Kumasi, (Ghana)
Soil erosion in the Navrongo-Bawku area is due to a combination of high intensity rains and inadequate vegetation cover. The main agency of erosion is water which causes both sheet erosion and gully erosion although the latter is less widespread. Sheet erosion is either moderate or severe. In the moderately eroded areas, about 0·9 m of soil have been removed whilst in the severely eroded areas, all the A and B horizons (solum) have been removed exposing a stiff impervious substratum. Streambank erosion is also a common feature,and its effect is severe. For soil rehabilitation to be effective, there is the need for provision for soil surveys, research on soil physical characteristics affecting erosion fertility investigatons and the working out of new agricultural systems.
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