Table 2 Counts of the rank assigned for each vegetative index (VI) (n = 27 vineyards) and the mean adjusted coefficient of regression (R^{2}_{adj}) value for each VI when regressed against vine pruning weight in each individual vineyard. PC1, first principal component; NDRE, normalized difference red edge; DifVI, simplified difference vegetation index; RECI, red-edge chlorophyll index; NDVI, normalized difference vegetation index; MSR, modified simple ratio; MTCI, MERIS terrestrial chlorophyll index; PCD/SR, Plant Cell Density or Simple Ratio.