The radio listening group (RLG) approach is widely used in developing countries, including Zimbabwe, where it has been tried in Chimhanda and Nswazi communal areas (Mudiwa, 1997). This approach involves gathering farmers together in groups to listen to radio programmes that address either specific geographic areas or the whole nation, depending on the heterogeneity of the farming regions. The farmer groups then discuss the extension issues raised in the programmes, and help each other to overcome any difficulties of understanding before applying any of the programmes' messages or technologies that are relevant or useful. The RLG approach helps farmers to learn about what other farmers are doing elsewhere. In addition, it creates awareness and interest at a relatively low cost per capita. On the other hand, most radio programmes provide only a one-way flow of information and lack feedback facilities. Furthermore, many African countries have only one central transmitter, which broadcasts to the whole country, so local and regional news items are often regarded as irrelevant. For example, Zimbabwean RLGs found lessons on coffee, potato, tobacco and caster bean production irrelevant to their needs (Mudiwa, 1997). Broadcasts on inconvenient week days or at busy times of day can also have a negative influence on the effectiveness and usefulness of this approach.