Question

Match List I with List II 
 
Choose the correct answer from the options given below: 
 

• A. A - III, B - IV, C - I, D - II
• B. A - IV, B - I, C - II, D - III
• C. A - I, B - II, C - III, D - IV
• D. A - II, B - III, C - IV, D - I

Hint:

To remember the characteristics:
- Blaney-Criddle is a simple, temperature-based method that relies on the latitude-dependent day-length factor.
- Penman is a more detailed method that combines energy balance with aerodynamic wind functions.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Crop water requirements are calculated by estimating Reference Evapotranspiration (\(\text{ET}_0\)).
Various empirical and physical methods are used, depending on the available meteorological data.
Detailed Explanation:
Let us match each evapotranspiration method with its key parameter:
- A. Blaney-Criddle method: This is a temperature-based method.
It calculates \(\text{ET}_0\) using mean monthly temperature and a day-length factor (\(p\)), which accounts for the percentage of annual daytime hours.
This matches with III. Day length related factor.
- B. Radiation method: This method is used when solar radiation data is available.
It estimates radiation levels using the ratio of actual to maximum possible sunshine hours (\(n/N\)).
This matches with IV. Ratio of actual to maximum possible sunshine hours.
- C. Modified Penman method: This is a comprehensive, physically-based method.
It includes a revised aerodynamic wind function term to model how wind speed and vapor pressure deficit affect evaporation.
This matches with I. Revised wind function term.
- D. Pan evaporation method: This method uses a physical pan of water exposed to the atmosphere.
The rate of water loss from the pan integrates the combined effects of solar radiation, wind, temperature, and relative humidity.
This matches with II. Integrated effect of radiation, wind, temperature, humidity.
Combining these pairs gives the sequence: \[ \text{A - III}, \ \text{B - IV}, \ \text{C - I}, \ \text{D - II} \] This matches Option (A).

Step 2: Final Answer:
The correct matching sequence is A - III, B - IV, C - I, D - II.