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 main objective of installing sub-surface perforated tile or pipe drains in heavy clay pastoral soils in New Zealand?

To supply dissolved synthetic fertilizers directly to deep subsoil clay minerals To trap surface runoff and store it permanently underground for summer drought irrigation To lower the water table and remove excess gravitational water to improve soil aeration and root growth To increase soil compaction so heavy livestock do not leave hoof prints in pasture

Correct Answer:

To lower the water table and remove excess gravitational water to improve soil aeration and root growth

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