Multiple choice

Which of these processes specifically reduces the soil pH?

  1. Surface runoff

  2. Crop rotation

  3. Soil erosion

  4. Soil acidification

  5. Desertification
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soil acidification is the buildup of hydrogen cations, also called protons, reducing the soil pH. This happens when a proton donor gets added to the soil. The donor can be an acid, such as nitric acid and sulfuric acid (these acids are common components of acid rain).

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