. 2018 Jul 3;9:936. doi: 10.3389/fpls.2018.00936

Table 3.

Vegetation indices used in this study.

Vegetation index	Equation	References	Platform
Normalized difference vegetation index	NDVI = (R₈₀₀−R₆₈₀)/(R₈₀₀+R₆₈₀)	Rouse et al., 1974	UAV, Ground
Green chlorophyll index	CI_G = (R₈₀₀/R₅₅₀)−1	Gitelson et al., 2005	UAV, Ground
Red edge chlorophyll index	CI_RE = (R₈₀₀/R₇₂₀)−1	Gitelson et al., 2005	UAV, Ground
Optimized soil adjusted vegetation index	OSAVI = (1+0.16)(R₈₀₀−R₆₇₀)/(R₈₀₀+R₆₇₀+0.16)	Rondeaux et al., 1996	UAV, Ground
Optimal vegetation index	$V I_{o p t} = (1 + 0.45) [{(R_{800})}^{2} + 1] / (R_{670} + 0.45)$	Reyniers et al.,, 2006	UAV, Ground
Optimal normalized difference index	NDI_opt = (R₅₀₃−R₄₈₃)/(R₅₀₃+R₄₈₃)	Stroppiana et al., 2009	Ground
MERIS terrestrial chlorophyll index	MTCI = (R₇₅₀−R₇₁₀)/(R₇₁₀+R₆₈₀)	Dash and Curran, 2004	Ground
Photochemical reflectance index	PRI = (R₅₇₀−R₅₃₁)/(R₅₇₀+R₅₃₁)	Peñuelas et al., 1994	Ground
Blue nitrogen index	BNI = R₄₃₄/(R₄₉₆+R₄₀₁)	Tian et al., 2011	Ground

The bands written correspond to the exact band used in this study. VI from aerial and ground-based platform were distinguished as VI_a and VI_g, respectively.