IGADD Member Countries Crop types and distribution by administrative units, 1987

The IGADD (Inter-Governmental Authority on Drought and Development)
crop zones dataset is part of the Africa UNEP/FAO/ESRI Crops Data. The
maps were prepared by Environmental Systems Research Institute (ESRI),
USA. The data was provided by Food and Agriculture Organization
(FAO), the Soil Resources, Management and Conservation Service, Land
and Water Development Division, Italy. The datasets were then
developed in collaboration with the United Nations Environment Program
(UNEP), Kenya.

The base maps used were the UNESCO/FAO Soil Map of the world (1977) in
Miller Oblated Stereographic projection, the Administrative Units map
and the World Atlas of Agriculture (1969). All sources were
re-registered to the base map by comparing known features on the base
map and the source maps. In the original Database (Africa), a
considerable study was made of crop water requirements for a range of
crops in the various African climates during the time of the year when
irrigation would be required. It was found that a relatively simple
relationship exists between annual rainfall and the crop irrigation
water requirements for the African food grain crops. It was also
observed that water requirements for food grains vary between fruit
and vegetable crops on the one side and fiber crops and fodder on the
other. No attempt was made to produce complex crop patterns. There
is a maximum of 13 crop types in one country.

References:
ESRI. Final Report UNEP/FAO world and Africa GIS data base (1984).
Internal Publication by ESRI, FAO and UNEP
FAO/UNESCO Soil Map of the Africa (1977). Scale 1:5000000. UNESCO,
Paris.
FAO. Administration units map. Scale 1:5 000 000. Rome.
FAO. Irrigation and Water Resources Potential for Africa. (1987)

Source :UNESCO/FAO Soil Map of the World. Scale 1:5000000
Publication Date :Nov 1987
Projection :Miller
Type :Polygon
Format :Arc/Info Export non-compressed
Related Data sets :All UNEP/FAO/ESRI Data sets
FAO Irrigable Data sets 100050:
" IRRIGLB lowland crops, best soils
" IRRIGLT lowland crops, best plus suitable soils
" IRRIGUB upland crops, best soils
" IRRIGUT upland crops, best plus suitable soils
FAO Soil water balance 100053:
" WATBALLB lowland crops, best soils
" WATBALLT lowland crops, best plus suitable soils
" WATBALUB upland crops, best soils
" WATBALUT upland crops, best plus suitable soils
FAO Agro-ecological zones
AEZBLL08 North-west of continent
AEZBLL09 North-east of continent
AEZBLL10 South of continent