A soil is said to be physiologically dry when

Soil is water logged

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Soil has high salt concentration

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Soil has low temperature

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All above cases prevail

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Solution

The correct option is C All above cases prevail
Physiologically dry soil means that water is present in the soil but is not available to the plants either because of high salt concentration, or lack of water in liquid form or poor aeration. These conditions respectively occur in saline marshes, cold deserts and water logged soil.

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