The NTA Multi-Commodity Solar Dryer (MCSD) is a passive dryer designed based on the principle of appropriate technology. It consists of a drying chamber whose roof and wall serve as solar collectors. Clear polyethylene plastic was used as glazing. An auxiliary heating system was provided using fuelwood and other solid fuels. Its design is so simple that farmers can build it themselves. When piloted under farmer's fields, the MCSD, was found to save up to 70% on fuelwood cost when used for tobacco curing. Other advantages cited by the farmers include saving in labor and ease in use. For other crops, solar energy alone is enough to effect drying. For example, rice with an initial moisture content (MC) of 24% can be dried to 11% MC in six hours of low intensity solar radiation. Corn on cob can be dried from 29% MC to 20% for safer shelling in 33 hours during the wet season. Garlic and onions can also be dried effectively.