Far less money is spent now on maintaining the vast networks of water drainage and irrigation that crisscross the country than was expended under Communism. Authorities spend about $12 per hectare on maintenance (a hectare is around two and a half acres), down from $120 per hectare in Soviet times, according to the International Water Management Institute. Blocked drainage pipes push salt levels up, damaging the land and dragging crop yields ever lower.

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Source: http://www.nytimes.com/2008/06/15/world/asia/15uzb