 Complete the following phrase:  Richards is an anthropological commentator and researcher on agricultural technology and African farming systems. Initially trained in human geography BSc Queen Mary University of London, 19631966 and African Studies MA SOAS, 1966-1967, he taught in Ibadan, Nigeria before completing a PhD in geography and specialising in Sierra Leone PhD London, 19731977. He has worked in Sierra Leone for over forty years, conducting ethnographic studies of Mende village rice farming systems and forest conservation on the Liberian border. After the region became affected by the 