Cause1:Insufficient processing facility
Ex)Cassava in Benin, West Africa
Cassava will rot that harvested by1-2 months
In order to store it for a long period of time, it must be a processed product "Gari".
To gully,
1. Wash clean
2. Peel
3. Crush by machine
4. Drain moisture with a press
5. Fry in a pan and dry
A lot of processing using such a machine is necessary.
However, there are not enough facilities for such processing, and many cassavas are rotten and discarded.