When starting the AEZ programme, it was decided to base this programme on 3 legs: the soils, the climate and the vegetation. The vegetation descriptors should include more than just the spatial extent of the different units (i.e. the output should be more than just a map); they should at least include the typical composition, a habitat description, a description of the structure, a listing of problem plants etc. This information can then be used for land use planning and farming purposes.