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NDVI
Normalized Difference Vegetation Index, the workhorse metric for biomass, vigor, and seasonal phenology tracked over time at field and regional scale.

Normalized Difference Vegetation Index, the workhorse metric for biomass, vigor, and seasonal phenology tracked over time at field and regional scale.
NDMI and NDWI variants quantify canopy and leaf water content, early indicators of drought stress and irrigation need.
Short-wave infrared absorption features detect subtle changes in plant water status before visible wilting appears.