Question

Match List I with List II:
List I
A. Thornthwaite formula
B. Stefan‐Boltzman constant
C. Albedo
D. Rower
E. FAOCLIM
List II
I. Weather data
II. Solar radiation
III. Value of constant C in Dalton's equation
IV. FAO Penman‐Montieth formula
V. Evapotranspiration
Choose the correct answer from the options given below:

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

Hint:

To quickly solve this match:
- Thornthwaite is a well-known evapotranspiration equation (A-V).
- Albedo measures reflected solar radiation (C-II).
This helps isolate the correct option (C) immediately.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Agrometeorology and crop water requirement studies rely on several empirical formulas, physical constants, databases, and environmental parameters.
Understanding these methods and concepts is essential for calculating evaporation and crop evapotranspiration.

Step 2: Detailed Explanation:
Let us analyze and match each item:
1. Thornthwaite formula (A):
This is a classic temperature-based empirical equation used to estimate potential evapotranspiration (V).
It requires only mean monthly air temperature and latitude data.
Hence, A matches with V.
2. Stefan-Boltzmann constant (B):
The Stefan-Boltzmann constant ($\sigma$) is a key physical constant used to calculate blackbody radiative heat transfer.
In hydrology, it is used in the FAO Penman-Monteith formula (IV) to calculate net outgoing longwave radiation from the soil and crop canopy.
Hence, B matches with IV.
3. Albedo (C):
Albedo is the reflection coefficient of a surface, defined as the fraction of incoming solar radiation (II) reflected back into space.
It is used in solar energy balance equations to calculate net shortwave radiation.
Hence, C matches with II.
4. Rower (D):
Rohwer's (Rower) evaporation equation is an empirical formula used to estimate evaporation from open water surfaces.
It is a modified version of Dalton's equation, featuring a specific constant C in Dalton's equation (III) that accounts for wind speed and atmospheric pressure.
Hence, D matches with III.
5. FAOCLIM (E):
This is a global agroclimatic database developed by the FAO.
It contains monthly weather data (I) and climatic averages from thousands of stations worldwide.
Hence, E matches with I.
Combining these matches, we get the sequence: A-V, B-IV, C-II, D-III, E-I.

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