Not for the first time, a study suggests that indigenous and scientific knowledge can add value to each other. This one comes from South Africa’s Human Science Research Council (scroll down to p.14 of the pdf). It found that any interventions to assist small scale farmers in the study area — two districts in Limpopo — would have to be low-cost and based on locally available resources and technologies. One of these resources turns out to be local leafy vegetables. The survey found that almost all respondents consumed African leafy vegetables, and dried and stored their leaves for use during the dry winter. It suggested that the communities could generate significant income by marketing this produce more widely.