Remote Sensing: An Advanced Technique for Crop Condition Assessment

Table 2

Main spectral vegetation indices used in agriculture.

Index	Equation	Usefulness
NG	G/ (NIR+R+G)	Carotenoids, anthocyanins, xanthophylls
NR	R/ (NIR+R+G)	Chlorophyll
DVI	NIR-R	Soil reflectance
GDVI	NIR-G	Chlorophyll, N status
NDVI	(NIR-R)/ (NIR+R)	Vegetation cover
GNDVI	(NIR-G)/ (NIR+G)	Chlorophyll and photosynthesis, N status

Abbreviation: A=adapted, D=difference, G=green, N=normalized, NIR=near-infrared, R=red, RVI=Ratio Vegetation Index, VI= Vegetation Index.