Multiple choice

Which of the following is a biotic component that affects the fertility of soil?

  1. pH

  2. Air content

  3. Fertilisers

  4. Plant
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plants are biotic (living) components that significantly affect soil fertility through root growth, leaf litter decomposition and organic matter addition. Biotic components include all living organisms like plants, animals and microorganisms, whereas pH and air content are abiotic factors. Fertilizers are human-added substances, not natural biotic components.

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