QCAA Earth & Environmental Science Practice Questions - QCAA Earth & Environmental Science External Assessment (Queensland) Exam

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What primary mechanism causes secondary salinisation in agricultural landscapes following deep-rooted native vegetation clearing?

Increased transpiration rates bringing fresh water to the surface Rising saline groundwater tables bringing stored salts into the root zone Direct deposition of atmospheric sea-spray onto surface soil layers Compaction of subsoil preventing downward movement of rainwater

Correct Answer:

Rising saline groundwater tables bringing stored salts into the root zone

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