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Global Change in Land Productivity 1981-2003

Map of 'Global%20Change%20in%20Land%20Productivity%201981-2003'

Losses in land productivity due to land degradation. Unsustainable practices in irrigation and production may lead to increased salinization of soil, nutrient depletion and erosion. An estimated 950 million ha of salt-affected lands occur in arid and semi-arid regions, nearly 33% of the potentially arable land area of the world. Globally, some 20% of irrigated land (450,000 km2) is salt-affected, with 2,500–5,000 km2 of lost production every year as a result of salinity (UNEP, 2008).


Note: Map production date estimated





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