Green Revolution 2.0
Remote Sensing
Jamie Jacobsen
• Goal: alleviate hunger by increasing
agricultural productivity per unit of land
• Focus on high yielding, fast growing crops
• Irrigation
• Farm management
First Green Revolution
BUT
• Sustainability: deep ground water sources
• Salinization: increase of salt content in soil
• Pollution: water contamination with herbicides
and pesticides
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Improve crop tolerance to stress
Increase input efficiency
Sustainability
Digital Revolution
Green Revolution 2.0
Remote Sensing
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Hot air balloons
WWI aerial photography
Cold War
Green Revolution 2.0: Target and monitor
agricultural investments and developments
Remote Sensing History
Remote Sensing
“The process [that] involves the detection
and measurement of radiation of different
wavelengths reflected or emitted from
distant objects or materials, by which they
may be identified and categorized by
class/type, substance, and spatial
distribution”
NASA Earth Observatory
• Passive vs. Active Sensors
Technology: EMR
1. Visible
2. Infrared
3. Microwave
Technology: Spectral
Reflectance Signature
Area of agricultural phenomena
Wavelength employed
1. Plant diseases and insect infestation
2. Natural vegetation, types of crop and fresh inventories
0.4-0.9 mm and 6-10 mm
3. Soil moisture content (radar)
0.4-0.9 mm and 6-10 mm
4. Study of arable and non-arable land
04-0.8 mm and 3-100 mm
5. Assessment of plant growth and
0.4-0.9 mm
rigour for forecasting crop yield
0.4-0.9 mm
6. Soil type and characteristics
0.4-1.0 mm
7. Flood control and water management
0.4-1.0 mm and 6-12mm
8. Surface water inventories, water quality
0.4-1.0 mm and 6-12 mm
9. Soil and rock type and conditions favorable
0.4-1.0 mm and 7-12 mm
for hidden mineral deposits.
1.
2.
3.
4.
5.
Emission of EMR
Energy from sensor to Earth’s surface
EMR interaction with objects
Energy back to remote sensor
Sensor data output
5 Stages of Remote Sensing
So…
Why do I care?
REMOTE SENSING:
Green Revolution Applications
Meteorology
Hydrology
Agriculture
Natural Disasters
• Oceanography
• Glaciology
• Geodesy
• Military
Others
• Advantages:
• Not necessary to be physically present.
• Survey large area at one time.
• Consistent, time series data shows change.
• Disadvantages:
• Subjective interpretation.
Main Points
• Numerous
applications
• Ability to monitor
change
• Continued investment
in future
Significant!
• Sanderson, Dr. Robert. “Introduction to Remote Sensing.”
New Mexico State University. Web 14 March 2013.
<ftp://ftp.wsl.ch/downloads/babst/Fernerkundung_WS2012/lit
eratur/remote_sensing.pdf>.
• Aggarwal, Shelafi. “Principles of Remote Sensing.” Web. 16
March 2013. http://wamis.org/agm/pubs/agm8/Paper-2.pdf
• Remote Sensing.” NASA Earth Observatory. Web. 08 April
2013.
http://earthobservatory.nasa.gov/Features/RemoteSensing/.
• Pingali, Prabhu L. “Green Revolution: Impacts, limits and the
path ahead.” Web. 20 March 2013.
• http://www.pnas.org/content/109/31/12302.
References