Existing on-farm post-harvest systems are described for harvesting, drying, seed selection, threshing and winnowing, on-farm storage, household food processing and grain marketing, and related research and development needs are identified. The current trade in mahangu grain in various markets is characterised and partially quantified. The service and commercial mahangu milling sectors are described and quantified, and the constraints they face are elucidated. Finally the summarised information is discussed in relations to mahangu promotion policy.