The sub-national irrigation statistics for most countries have been combined with the geospatial statistics to develop the Global Map of Irrigation Areas (GMIA). The target year for the statistics is the year 2005. The data listed by country is available on: (i) area equipped for irrigation by source of water and (ii) area actually irrigated by source of water.
The update frequency of sub-national data is erratic. Nevertheless, when enough data is gathered to substantiate an update, this is performed.
Additional resources: The sub-national irrigation areas are part of a large analysis conducted over several years, in collaboration with the University of Kassel during 2000-2004, the Johann Wolfgang Goethe University in Frankfurt am Main during 2004-2009 and the Rheinische Friedrich-Wilhelms-Universität in Bonn since 2009. Please see the Global Map of Irrigation Areas (GMIA) page for more details.
Quote as: FAO. [yyyy]. AQUASTAT - Global Map of Irrigation Areas. Food and Agriculture Organization of the United Nations (FAO). Website accessed on [yyyy/mm/dd].
Info for all countries available through the Irrigation by country section