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Drought

Glossary Source

A naturally occurring phenomenon that exists when precipitation has been significantly below normal recorded levels, causing serious hydrological imbalances that adversely affect land resource production systems.

Meteorological drought is defined solely on the basis of the degree of dryness (often in comparison to some normal or average amount) and the duration of the dry period and must be region-specific.

Agricultural drought focuses on factors such as differences between actual and potential evapo-transpiration and soil-water deficits, are crop-specific and depend heavily on the timing of