Otsuka, Keijiro; Kalirajan, Kaliappa P. - In: The Electronic Journal of Agricultural and Development … 2 (2005) 1, pp. 1-6
While population still continues to grow rapidly in Sub-Sahara Africa, the expansion of cultivation area has slowed down considerably due to the increasing scarcity of uncultivated land. Since the yield of food grain per unit of land has remained largely unchanged in this region, food production...