(b) Soil characteristics that have favoured the cultivation of cocoa (Zones C):
(i) The land is undulating
(ii) It has well drained surface
(iii) It has a deep clayey and rich-in-acid soil.
Soil characteristics that favoured the cultivation of groundnut (Zone A):
(i) The soil has a wide plain
(ii) The top soil (A - Horizon) is humus
(iii) The soil is loose and sandy.
Soil characteristics that favoured the cultivation of yam (ZoneB):
(i) Well drained soil
(ii) Soil is sandy loam
(iii) It is not acidic and it is well aerated.