NASA Earth Observatory – Vegetation Index
The NDVI (Normalized Digital Vegetation Index) is on of the primary methods for detecting healthy vegetation using satellite imagery. This also serves as a useful way to distinguish between distinct ecological and agricultural regions and the temporal patterns of planting seasons.
This video was found on a site titled “Explorations in agricultural research” with many great links http://zerogravitygardening.blogspot.com/
See on www.youtube.com