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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Compared to solid walls, why are artificial windbreak nets with approximately 50% porosity preferred for reducing wind velocity across crop rows?

They completely block all incoming wind while reflecting solar heat onto the growing crop They allow a portion of wind to pass through, creating smooth filtered air flow without severe turbulence downwind They trap wind inside the fabric fibers to increase relative humidity in open fields They redirect 100% of wind upward into the higher atmosphere without impacting soil erosion

Correct Answer:

They allow a portion of wind to pass through, creating smooth filtered air flow without severe turbulence downwind

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