Earthworms are often called 'friends of the farmer'. Which of their activities directly enhances soil…

Earthworms are often called 'friends of the farmer'. Which of their activities directly enhances soil fertility?
  1. Burrowing loosens the soil and their excreta forms nutrient-rich humus.
  2. They absorb excess water from plant roots to prevent rotting.
  3. They consume and destroy all soil bacteria and fungi.
  4. They release nitrogen gas directly into plant stems.

Solution

Earthworms burrow into the soil, creating air spaces that help roots breathe and absorb water, while their waste (castings) enriches the soil with humus.

Asked in: Homi Bhabha Practice

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