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semi-arid zone

semi-arid zone

(1) Zone in which in some years precipitation is insufficient to maintain cultivation. (2) Zone in which evaporation frequently exceeds precipitation.

semi-arid zone

Areas where vegetation growth is constrained by limited water availability, often with short growing seasons and high interannual variation in primary production. Annual precipitation ranges from 300 to 800 mm, depending on the occurrence of summer and winter rains.