Fig. 5From: A robust spectral angle index for remotely assessing soybean canopy chlorophyll content in different growing stagesThe responses of the angles α (a) and β (b), and the VNAI (c) to Chl-Cab and LAI (LAI: 2:0.5:8 m2/m2). Red and blue boxes represent low (Chl-Cab < 20 μg/cm2) and high (Chl-Cab > 20 μg/cm2) Chl-Cab samplesBack to article page