According to India’s National Remote Sensing Agency, “Remote Sensing is the technique of acquiring information about objects on the earth’s surface without physically coming into contact with them.”

• PRINCIPLE:

1. The energy comes down to the earth and a part is reflected and detected by a sensor;
2. The detection is captured as data, which is sent to the receiving station;
3. Some pre-processing takes place in the receiving station, and then the pre-processed data is handed over to the users;
4. The users analyze the data for their own application.

 Principle of Remote Sensing

PDF Download: Horti-Business Management

• TYPES :

1. Passive Remote Sensing
2. Active Remote Sensing

• Active remote sensors create their own electromagnetic energy that is transmitted from the sensor towards the terrain interacts with the terrain producing a backscatter of energy and it’s recorded by the remote sensor’s receiver.
• Passive sensor detects the naturally transmitted microwave energy within its field of view

Representation of types of sensing

APPLICATIONS OF RS  IN AGRICULTURE:

• Identification, area estimation and monitoring
• Crop nutrient detection
• Soil mapping
• Crop condition assessment
• Agricultural drought assessment
• Crop yield modeling and production forecasting
• Identification of planting and harvesting dates
• Identification of pest and disease infestation
• Irrigation monitoring and management

PROS OF REMOTE SENSING:

1. Good spectral and spatial resolution.
2. Allows broad regional coverage.
3. Allows continuous acquisition of data.
4. Provides cost effective and map accurate data.
5. Provides large archive of historical data.

LIMITATIONS OF REMOTE SENSING:

1. Cost of data collection and data purchase is high.
2. Problems with data analysis and interpretation.
3. Problems with all weather capability as all sensors cannot see through clouds.
4. Potential limitations with spatial, spectral and temporal resolutions of the various sensors.

 

• CONCLUSION:
• Remote sensing technology has developed from balloon photography to aerial photography to multi-spectral satellite imaging.
• Some of the benefits that can be gained from the use of remote sensing-

1. Early identification to crop health and stress
2. Ability to use this information to do remedial work on the problem
3. Improve crop yield
4. Crop yield predictions
5. Reduce costs
6. Reduce environmental impact
7. Crop management to maximize returns through the season

 

• REFERENCES:

www.knowledgebank.irri.org

https://slideshare.com

www.researchgate.net

www.cropcopter.co

www.agrimoon.com

 

 

 

PRESENTED BY:

Nihrika Khanna

B.Sc(Hons.) Agriculture

Rayat Bahra University, Mohali

99dr.niharika@gmail.com