Physical dryness and physiological dryness of soil

Explanation

### Step-by-Step Solution:

1. **Definition of Physical Dryness**:
- Physical dryness of soil refers to an actual shortage of water in the soil. This means that the soil does not have enough moisture to support plant growth.

2. **Characteristics of Physical Dryness**:
- In conditions of physical dryness, the soil is unable to provide sufficient water to the plants, leading to stress and potential wilting of the plants.

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