Question

The pF range of soft or friable consistency of soil is:

• A. More than 4.5
• B. 2.8–4.5
• C. 0.5–2.8
• D. Less than 0.5

Hint:

Remember typical pF values corresponding to soil consistency for field condition analysis.

Answer 1

The Correct Option is C

Step 1: \( pF = \log_{10}(\text{suction in cm of water}) \); a higher pF means a drier soil.
Step 2: Below pF 0.5 the soil is fluid or viscous; above pF 4.5 it is very dry, near the wilting point.
Step 3: The friable or soft, easily crumbled state falls in between these extremes.
Correct option: \[ \boxed{pF = 0.5\text{ to }2.8} \]