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This chapter takes the local factors most evident in the periurban interface (PUI) of the Ghanaian city of Kumasi and considers the relevance of these factors to have common application and consequences in other cities' PUIs. Three approaches to the discussion of the nature of the PUI of Kumasi are employed. First, agricultural production is considered as well as the differences between urban, periurban and rural farming systems and changes occurring therein. Second, market and transportation systems and their spheres of influence are considered. Third, cluster analysis is applied to a spread of mainly socioeconomic variables taken from an extensive village survey.

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This review had an international rather than a country-specific focus although most of the examples cited were from developing countries. The review formed part of a strategy to develop and promote cost-effective techniques for recycling/processing organic waste-stream products (municipal waste, night soil and sewage sludge, poultry manures, and agroindustrial wastes from crop processing and livestock) for use as a fertilizer and contributed to the wider goal to increase productive potential by greater use of waste materials and recycling of resources. The information is given as a checklist to aid decision making.

A pilot compost station using organic wastes from households and markets, which has been running in Lomé, Togo, since September 1999, is described. The station aims to produce composts for vegetable farmers, not only for soil amelioration but also for phytosanitary purposes (pest and disease control).