The annual rainfall shows a bimodal distribution
pattern, leading to two rainy seasons corresponding to two
cropping periods (March–June and September–November). The
annual rainfall varies between 1500 and 1900mm and the mean
annual temperature is 24 C (Santoir and Bopda, 1995). The area is
an undulating landscape with altitudes ranging between 600 and
900m (a.s.l).