Regreening Africa's landscape - Trees as natural fertiliser
Trees -- such as those of the Faidherbia genus -- are planted in fields or pastures as natural fertilizer. Intercropping with trees on farmland has now become popular. In Zambiamore than 160,000 farmers plant Faidherbia trees in their fields. Farmers in Niger have been able to make 4.8 million hectares of land greener and more fertile, thanks to these EverGreen Agriculture.