Question

Match List-I with List-II. 

List-I (Event)	List-II (Function)
(A) Thermal Imaging	(I) Monitoring crop water stress and irrigation management
(B) Radar Remote Sensing	(II) Identifying crop types and crop health
(C) Normalized Difference Vegetation Index (NDVI)	(III) Mapping soil moisture content and terrain elevation
(D) Multispectral Imaging	(IV) Detecting temperature variations in crops for stress detection

Choose the correct answer from the options given below.

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

Hint:

Connecting "Thermal" directly to "temperature variations" (A $\rightarrow$ IV) is a highly reliable starting point to eliminate incorrect options.

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Remote sensing techniques utilize different regions of the electromagnetic spectrum to monitor agricultural parameters such as crop health, canopy temperature, and soil physical properties.

Step 2: Detailed Explanation:
Let us match the techniques in List-I with their corresponding applications in List-II:
- (A) Thermal Imaging $\rightarrow$ (IV) Detecting temperature variations in crops for stress detection: Thermal sensors measure emitted infrared radiation, which directly represents surface temperature and can spot water-stressed canopies.
- (B) Radar Remote Sensing $\rightarrow$ (III) Mapping soil moisture content and terrain elevation: Microwave active sensors can penetrate clouds and superficial soil layers to estimate moisture levels and structural topography.
- (C) Normalized Difference Vegetation Index (NDVI) $\rightarrow$ (II) Identifying crop types and crop health: This reflectance ratio (NIR and Red) is the standard index for chlorophyll density and overall photosynthetic vigor.
- (D) Multispectral Imaging $\rightarrow$ (I) Monitoring crop water stress and irrigation management: Utilizes several discrete bands to track crop indices over time to optimize irrigation schedules.

Step 3: Final Answer:
The matching corresponds to Option (C).