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TeachMeFinance.com - explain normalized difference vegetation index normalized difference vegetation index The term 'normalized difference vegetation index' as it applies to the area of Earth observation can be defined as ' An index, or scale, of vegetation conditions based on differences in the amount of visible and near-infrared light reflected from plants on Earth's surface. A vegetation index is a gauge of plant health, productivity, and density. Plant leaves absorb visible light for use in photosynthesis, and they reflect near-infrared light. A light-measuring sensor looking at a healthy plant sees very little reflected visible light and lots of near-infrared light. The more healthy green leaves a plant has, the stronger the difference between the amount of visible and near-infrared light it reflects, and the higher the vegetation index. An unhealthy plant will have fewer green leaves, resulting in a lower score on the '. Previous 5 Terms: Normal Operating Cell Temperature (NOCT) Normal water surface Normal Water Surface Elevation Normal Year Normal yield Next 5 Terms: North American Electric Reliability Corporation (NERC) North American Electric Reliability Council (NERC) North American Free Trade Agreement (NAFTA) North American Free Trade Agreement Implementation Act North American Industry Classification System (NAICS) About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.