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  • Which of the following represents the water capacity of soil that is available to the plants?Option: 1 Field capacity<div class='qna-op

Which of the following represents the water capacity of soil that is available to the plants?

Option: 1

Field capacity


Option: 2

Storage capacity


Option: 3

Echard


Option: 4

All of these


Answers (1)

best_answer

 

 

 

  • The soil water occurs in the following forms:
    • Gravitational Water: The rainwater that seeps into the soil to contribute to the water table under the influence of gravity. It is beyond the reach of the plants.
    • Capillary Water: A large proportion of water which is retained between the soil particles against gravity. This water is available to the plants.
    • Hygroscopic Water: Water held by the soil particles in the form of thin-film due to the adhesive property of soil particles.
  • Root hair cells absorb capillary water.
  • The amount of all forms of water present in the unit weight of soil under controlled condition is called Field Capacity.
  • The amount of capillary water present in the unit weight of soil under controlled condition is called Storage Capacity.
  • The amount of water present in the soil when permanent wilting is attained by the plant is called permanent wilting percentage.

 

- Storage capacity is the amount of capillary water present in the unit weight of the soil. The capillary water is available to the plants. Hence, the correct answer is option b.

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