The document discusses crop development and cassava production trends in sub-Saharan Africa from 1985 to 2008. It finds that while cereal production increased, the rate of growth slowed after 2000. Production of oilseeds, legumes, tubers and bananas improved but did not keep up with population growth. Cassava yields increased slowly across Africa. In West Africa, cassava production per capita doubled but progress varied by country. In East Africa, cassava production per capita decreased on average except in a few countries like Malawi.