Question

Soil temperature at 5 cm depth is higher in

• A. Crop field
• B. Bare field
• C. Wet field
• D. Ploughed field

Hint:

Soil temperature:
- Bare field: Higher temperature (no vegetation cover).
- Crop field: Lower temperature (shading by vegetation).
- Wet field: Lower temperature (high specific heat of water).

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
This question tests knowledge of factors affecting soil temperature.

Step 2: Detailed Explanation:
Soil temperature at 5 cm depth is higher in a Bare field (B).
Bare soil has no vegetation cover to intercept solar radiation.
It absorbs more solar radiation and heats up faster.
Other conditions:
- Crop field (A): Vegetation cover shades the soil, reducing temperature.
- Wet field (C): Water has high specific heat; temperature is lower.
- Ploughed field (D): Ploughing increases porosity and reduces thermal conductivity.
Thus, bare field has higher soil temperature.

Step 3: Final Answer:
Thus, soil temperature at 5 cm depth is higher in a bare field, which corresponds to option (B).
[0.5cm]