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The next five figures show the estimated yield and growing areas of key
crops. Both sorghum (Figure 10.9) and millet (Figure 10.10) are mainly grown in the central and northern regions of Nigeria. However, part of the north- east is not favorable to the growth of millet. As shown in Figure 10.11, cassava is now widely grown and is being introduced in the northern extremes of the country. Rainfed yams and sweet potatoes are widely grown across the coun- try, with high concentrations in the north central and southeastern areas and on the southern flank of northeastern Nigeria (Figure 10.12). Rainfed maize is grown from the coast to the northern flank of the country (Figure 10.13). For all these crops, the yield does not vary significantly across the country.
Scenarios of the Future
Economic and Demographic Indicators Population Figure 10.14 shows population projections made for Nigeria by the United Nations (UN) population office through 2050. The projected population
FIGURE 10.9
Yield (metric tons per hectare) and harvest area density (hectares) for rainfed sorghum in Nigeria, 2000