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- Agriculture 81
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- Irrigation 18
- Bureaucracy 16
- Groundwater 16
- Water consumption 14
- Water quality 12
- Hydrology 9
- Technology 9
- Demography 8
- Finance 8
- Precipitation (Meteorology) 8
- Water-supply 8
- Human settlements 6
- Industries 6
- Aquifers 5
- Climate 5
- Resource allocation 5
- Arabah Valley (Israel and Jordan) 4