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Question

In soil, water available to plant roots is


A

Hygroscopic water

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B

Capillary water

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C

Gravitation water

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D

Colloid water

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Solution

The correct option is B

Capillary water


The correct option is B.

Explanation of the correct option: -

  1. It's the water that's held in the soil's micropores, or more accurately, the soil pore spaces.
  2. The water that makes up the soil solution is retained loosely around the soil particles and this is the most readily available kind of water for plants to use.

Explanation of the incorrect options: -

Option A: - Attractive forces hold hygroscopic water on the surface of soil colloidal particles. It exists in the form of a vapor rather than a liquid. It is so densely bound by particles that it is not available for absorption by plant roots.

Option C: - The movement of water in relation to the force of gravity is known as gravitational water. During rainfall, water is stored in the soil layers, and it is subsequently transported from the higher layers to the lower layers and roots.

Option D: - The colloidal water is the soil's main living part, and it dictates the majority of its physicochemical features .They're important because the positively charged ions on their surfaces absorb soil nutrients when they're dissolved in water.

Final Answer: - In soil, water available to plant roots is capillary water.


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