Question

Match List-I with List-II

Choose the correct answer from the options given below:

• (A) - (I), (B) - (II), (C) - (III), (D) - (IV)
• (A) - (IV), (B) - (I), (C) - (II), (D) - (III)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (IV), (B) - (I), (C) - (III), (D) - (II)

Hint:

Keen's Box is a classic, unique soil physical apparatus for water holding capacity (B-I).
A Pyrheliometer is specifically for direct solar radiation (D-III).
Using these two specific connections helps quickly identify the correct matching option.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Specialized instruments and physical devices are used in soil physics, agrometeorology, and plant physiology to measure specific ecological and structural parameters.

Step 2: Detailed Explanation:
Let us match the instruments with their measurement purposes:
- (A). Lysimeter: This is a device containing a block of soil, used to measure water percolation, solute leaching, and evapotranspiration.
It can also be fitted with tensiometers to monitor soil moisture tension or matric potential within the soil column.
Thus, (A) matches with (IV).
- (B). Keen's Box: The Keen-Raczkowski box is a standard metal box with a perforated brass bottom, used in soil laboratories to determine soil physical properties like maximum water holding capacity, bulk density, and pore space.
Thus, (B) matches with (I).
- (C). Hygrometer: This is a meteorological instrument used to measure the moisture content or relative humidity of the atmosphere.
Thus, (C) matches with (II).
- (D). Pyrheliometer: This is a highly specialized instrument designed to measure direct solar radiation at normal incidence, separating it from diffuse sky radiation.
Thus, (D) matches with (III).
This gives the matching sequence: (A) - (IV), (B) - (I), (C) - (II), (D) - (III).

Step 3: Final Answer:
The correct matching sequence is (A) - (IV), (B) - (I), (C) - (II), (D) - (III).