**2. Materials and methods**

Materials used were the various works done in the area of soil fertility management in the Savanna regions within the sub-Saharan Africa. These are published books, journal papers, annual reports and technical reports. It also included works done by the author, students dissertation supervised by the author and personal experiences gathered. Suc‐ cess stories from other interventions by the Government and Non-governmental Organi‐ zations implemented in the form of projects to raise soil fertility status in the zone were also considered. All were reviewed, discussed and conclusions drawn from the results of these various practices.

The various interventions being practiced within the Sub-region to enhance or maintain the soil fertility status include the manipulating of the crops planted (cropping systems) in the area. Others are land rotation, conservation agriculture and the application of different types of soil fertility enhancing materials and the integration of some or all of these as a sin‐ gle treatment. The difficulties associated with adoption of these practices will also be out‐ lined. Some of these are:
