NCEA Level 2 Agricultural And Horticultural Science Practice Questions - National Certificate Of Educational Achievement Level 2 Agricultural And Horticultural Science Exam

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What is the primary function of wind-powered or engine-driven frost fans used in New Zealand horticultural orchards during cold spring nights?

To blow warm air downward by mixing the atmospheric inversion layer with cold ground-level air To generate artificial wind that physically dries frost moisture directly off fruit blossoms To increase ground evaporation so that water vapor absorbs ambient freezing air To pull cold air upward from the roots into the upper canopy to equalize tree temperature

Correct Answer:

To blow warm air downward by mixing the atmospheric inversion layer with cold ground-level air

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