I am grateful for information provided by the following people, which has informed and extended the scope of this booklet: Ms Sue Azam Ali, Intermediate Technology Development Group, Bourton on Dunsmore, UK, Mr Barrie Axtell, Midway Technology Ltd., Bonsall, Derbyshire, UK and Mr Peter Steele, Senior Agro-Industries Officer, Agricultural & Food Engineering Technologies Service (AGST), FAO, Rome, Italy.
Dr Peter Fellows
Midway Technology Ltd
