In recenty ears, FA0 has gainedv aluablee xperiencei nt hed evelopment of such GISLIS’S to address issues of improved integrated planning and management of land and water resources, based on quantified assessments of resources potentials and limitations and the issue of a rational and efficient use of soils, water and nutrients in biomass production. At the core is FAOs effort in thed evelopment of itsA gro-ecologicalZ oning (AEZ) Methodology (FAO, 1978-1981) for land resources appraisal which implements the land evaluation approach of FAOs Framework for Land Evaluation (FAO, 1976). AEZ has two conlponents: