Question:
Water that is held at a potential greater than \(-\frac{1}{3}\) bar and that portion of soil water that will drain freely from the soil by force of gravity is called:
Water that is held at a potential greater than \(-\frac{1}{3}\) bar and that portion of soil water that will drain freely from the soil by force of gravity is called:
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Gravitational water drains freely from soil due to gravity and is generally not available to plants for long.
Updated On: May 18, 2026
- Capillary water
- Hygroscopic water
- Gravitational water
- Flood water
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The Correct Option is C
Solution and Explanation
Concept:
Soil water is classified as gravitational water, capillary water and hygroscopic water depending on how strongly it is held by soil particles.
Step 1: Understand gravitational water.
Gravitational water is water that occupies large pores and drains freely under the force of gravity.
Step 2: Relation with field capacity.
Field capacity is around: \[ -\frac{1}{3}\ \text{bar} \] Water held at potential greater than this drains out freely.
Step 3: Identify the type.
The freely draining water is: \[ \text{Gravitational water} \] \[ \therefore \text{Correct Answer is (C)} \]
Soil water is classified as gravitational water, capillary water and hygroscopic water depending on how strongly it is held by soil particles.
Step 1: Understand gravitational water.
Gravitational water is water that occupies large pores and drains freely under the force of gravity.
Step 2: Relation with field capacity.
Field capacity is around: \[ -\frac{1}{3}\ \text{bar} \] Water held at potential greater than this drains out freely.
Step 3: Identify the type.
The freely draining water is: \[ \text{Gravitational water} \] \[ \therefore \text{Correct Answer is (C)} \]
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