Multiple choice

How can irrigation make land unproductive overtime due to salinization?

  1. irrigated water flows through the soil removing the salt

  2. the wells are built too close to the ocean coastlines

  3. irrigated water has salt which stays after water evaporates

  4. irrigated water has salts which evaporate into the air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Irrigation water contains small amounts of dissolved salts. When the water evaporates from the soil, the salts are left behind, gradually accumulating and making the soil saline and unproductive.

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