Fig. 4From: A robust spectral angle index for remotely assessing soybean canopy chlorophyll content in different growing stagesA schematic representation of the experimental methodology. VI: vegetation index. Chl: chlorophyll. SRF: spectral response function. Chl-D: soybean leaf Chl content dataset measured using a Dualex 4 scientific portable sensor. PSND: Pigment-specific Normalized Difference. NDRE2: Normalized Difference Red-edge Version 2. TCARI/OSAVI_RE: Red-edge-based Transformed Chlorophyll Absorption Reflectance Index/Optimized Soil-adjusted Vegetation IndexBack to article page