Before turning to more complex tasks as implied by national policy planning, valuable information about the resource endowment of a country regarding agricultural production potential can be obtained by assessing the extents of land and their average suitability to producing individual crops. To this effect, all included crop types, grasses and fuelwood species are evaluated in each of the more than 90000 agro-ecological cells, thereby quantifying potential arable extents in terms of five quality classes and corresponding minimum, average and maximum production. Where possible and relevant, sequential (mono) cropping sequences are constructed to assess the full production potential in areas with long growing periods. In each agro-ecological cell a ‘reasonable’ agricultural land use is determined, considering crop suitability and production stability, to derive district level estimates of rainfed arable land. Hence, this Technical Annex is concerned with the fourth item in the above list of utility programs surrounding the AEZ-CCS package, crop productivity assessment and production potential.