Question

At what inclination to the ground, the soil thermometers are installed in the observatory?

• A. 30 degrees
• B. 45 degrees
• C. 60 degrees
• D. 90 degrees

Hint:

Memorize standard procedures: Soil thermometer at 45°, dry/wet bulb in Stevenson screen for atmospheric temperature.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Soil thermometers are instruments used to measure soil temperature at different depths.
Their installation angle affects accuracy.

Step 2: Key Approach:
This is a factual question about agro-meteorological practices.

Step 3: Detailed Explanation:
Soil thermometers are installed at a 45-degree inclination to the ground in observatories.
This ensures good contact with the soil and minimizes the effect of direct solar radiation.
A vertical placement (90 degrees) would expose the bulb to sunlight and air, giving inaccurate readings.
A horizontal placement (0 degrees) is not practical.
The 45-degree angle also helps in easy insertion and removal.
Standard meteorological practices recommend this angle.
It allows the thermometer to measure the temperature at a specific depth accurately.