Time series data reveals that the Sahel of Cameroon has experienced several years of deficits in cereal production.
The debate attributes the observed trends to low rainfall. Uncertainties in the debate on the role of rainfall as a
principal causal factor are evident and need verification. Both field and desk studies have been used; this involved
the administration of 200 questionnaires and focused group discussions. The desk studies included detailed
literature review and analysis of Normalized Difference Vegetation Index (NDVI) satellite images of vegetation
and rainfall from the Global Precipitation Climatology Project (GPCP). The results show that cereal production
has declined while rainfall has increased by 30-40% in the last decade in the study area. With an increase in rainfall,
the observed decline in cereal production cannot be explained by climate only. Land use changes such as
deforestation patterns are significant in explaining the trends in cereal output as seen in population perceptions.