It is estimated that in the tropics year between 25 and 40% of stored agricultural product is lost because of inadequate farm-and village-level storage. In the field and during storage the products are threatened by insects, rodents, birds and other pests. Moreover, the products may be spoiled by infection from fungi, yeasts or bacteria. In addition, for sowing seed it is important that the viability of the seed (it’s capacity to germinate) is maintained.