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WBCS Main Examination 2023 — Paper IV: General Studies II · Question 196 of 200

Q196
General ScienceBiology
The water which is available to plant roots is
  1. a.Gravitational water.
  2. b.Chemically combined water.
  3. c.Hygroscopic water.
  4. d.Capillary water.

Answer: (D) Capillary water.

Capillary water, held in the small soil pores against gravity, is the main water available to plant roots. Gravitational water drains away quickly, hygroscopic water is held too tightly on soil particles, and chemically combined water is locked in minerals.

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