"Fertilizer tree" triples Malawi, Zambia yields

Scientists have managed to triple maize yields on smallholder farms in Zambia and Malawi by simple "evergreen agriculture" techniques. Planting acacia trees among the crops automatically fertilised the fields.

Scientists from the World Agroforestry Centre now call for a scaling-up of the use of so-called "fertilizer trees" in fields throughout Africa to fight climate change and increase food security.