Question

Available water for plant indicates water held in

• A. 0.33 - 15 bar
• B. 0.1 - 0.2 bar
• C. Above 15 bar
• D. Below 0.1 bar

Hint:

Plant available water:
- Field capacity: 0.33 bar.
- Permanent wilting point: 15 bar.
- Available water = FC - PWP.

Answer 1

The Correct Option is A

Step 1: Understanding the Question:
This question tests knowledge of plant available water (PAW) in soil.

Step 2: Detailed Explanation:
Available water for plants is the water held between field capacity (0.33 bar) and permanent wilting point (15 bar) (A).
This range is the plant available water (PAW).
- Field capacity: 0.33 bar (or 1/3 bar).
- Wilting point: 15 bar.
Other ranges:
- 0.1 - 0.2 bar (B): Gravitational water (not available).
- Above 15 bar (C): Unavailable water.
- Below 0.1 bar (D): Gravitational water.
Thus, available water is between 0.33 and 15 bar.

Step 3: Final Answer:
Thus, available water is held between 0.33 and 15 bar, which corresponds to option (A).
[0.5cm]