Agricultural productivity is low in Sub-Saharan Africa making it a major impediment to regional food security. International development agencies maintain that the wider adoption of agricultural machinery is necessary to raise crop yields and improve food security. Sub-Saharan African food security is also affected by social, economic and political challenges that cannot be addressed by technology alone, however. A single-minded focus on agricultural mechanisation, which does not take those other challenges into account, could create other, or add to those, problems. If mechanisation programmes are accompanied by training and extension services that improve employment prospects and reduce environmental degradation, some of the main challenges associated with agricultural mechanisation can be avoided.