Or there are just too many civil wars in Africa. In the long run, we're all dead. John Maynard Keynes
T. S. Payne at the FAO wrote:
Losses of wheat due to inadequate storage and other post-harvest factors at the farm, village and commercial levels of up to 4 percent have been observed (McFarlane, 1989; Abdullahi and Haile, 1991), though losses in excess of 40 percent for other cereals are not uncommon (NRC, 1996).
[References are to the bibliography at the end of the quoted article.] A doo run-run-run, a doo run-run