Old wine in a new bottle
pedro sanchez, head of Nairobi-based International Centre for Research in Agroforestry (icraf), was recently awarded the World Food Prize for his research into low-technology methods for improving soil fertility. His research reveals that by using leguminous trees rather than plants, soil fertility can be improved cost-effectively.
Crop rotation using legumes such as clover and alfalfa is standard practice in many parts of the world for increasing soil fertility. Roots of legumes harbour bacteria that are able to extract atmospheric nitrogen