Issue link: http://winesandvines.uberflip.com/i/776679
86 WINES&VINES February 2017 GRAPEGROWING WINE EAST RESULTS FOR YIELD COMPONENTS, BERRY COMPOSITION AND NDVI Variable Year Mean Median CV% Spread* Moran's I z-score P value Random Clustered NDVI fruit set 2014 0.797 0.797 1.06 4.77 0.469 3.915 0.0001 2015 0.828 0.829 0.92 4.12 0.446 3.719 0.0002 NDVI lag phase 2014 0.786 0.787 1.60 6.94 0.550 4.566 0.0001 2015 — — — — 0.221 1.897 0.058 NDVI véraison 2014 0.765 0.767 1.82 8.58 0.611 5.077 0.0001 2015 0.745 0.744 1.56 6.55 0.668 5.518 0.0001 FVT (mg/ kg) 2014 0.36 0.35 15.84 59.20 0.253 2.152 0.031 2015 0.64 0.65 23.58 79.41 0.316 2.659 0.008 PVT (mg/ kg) 2014 1.59 1.61 17.84 73.36 0.201 1.747 0.081 2015 2.57 2.65 24.98 94.26 0.419 3.496 0.0005 SM (%) fruit set 2014 22.5 21.8 15.9 74.2 0.057 0.577 0.564 2015 25.4 25.3 11.3 49.3 0.446 3.717 0.0002 SM (%) lag phase 2014 21.8 21.8 13.9 67.4 0.253 2.161 0.0307 2015 18.2 18.3 12.3 69.9 0.361 3.058 0.002 SM (%) mean 2014 22.8 22.6 9.5 47.9 0.297 2.526 0.012 2015 20.4 20.4 10.1 48.0 0.493 4.111 0.0001 Leaf ψ fruit set 2014 -0.87 -0.88 -10.73 -40.00 0.368 3.083 0.002 2015 -0.51 -0.51 -11.91 -41.18 -0.254 -0.820 0.412 Leaf ψ lag phase 2014 -0.83 -0.83 -10.80 -39.39 0.399 3.330 0.0009 2015 -0.81 -0.82 -12.52 -63.06 0.084 0.615 0.538 Leaf ψ mean 2014 -0.82 -0.80 -7.62 -27.08 0.401 3.350 0.0008 2015 -0.78 -0.78 -9.66 -37.98 -0.007 0.189 0.851 Basic statistics and spatial autocorrelation (Moran's I, z-scores and p-value) for the Lambert Riesling Vineyard in Virgil, Ontario, 2014-15. Abbreviations: NDVI: Normalized Difference Vegetation Index; FVT: Free volatile terpenes; PVT: Potentially-volatile terpenes; SM: Soil moisture. Leaf ψ values are in MPa. *Spread [8] = subtraction minimum from the maximum values, expressed as a percentage of the median value. Patterns are expressed as random or clustered and are indicated for each corresponding attribute (). Results and industry potential In Cave Spring Riesling (see "Cave Spring Riesling" on page 82), NDVI observations corre- lated well with yield and cluster weight with the eastern side showing pockets of high values and the west side showing low values. Free volatile terpenes (FVT) were inversely correlated with NDVI, particularly in the eastern section of the block. In Cave Spring Cabernet Franc (see "Cave Spring Cabernet Franc"), NDVI demonstrated highly similar patterns with vine size and correlated well with leaf ψ, whereby low leaf ψ values were found in the central and eastern side of the block. Berry composition variables (color, an- thocyanins and phenols) showed very high temporal consistency in both years and were inversely correlated with NDVI. In Coyote's Run Pinot Noir (see "Coyote's Run Pinot Noir"), NDVI showed correlations with yield and vine size in the west side of the block; similarities with SM were strong, while inverse rela- tionships with color were exhib- ited. SM showed very temporally consistent patterns in both vin- tages, with high SM in the west- northwest side and low SM in the south-southeast side of the block. In Lambert Cabernet Franc (see "Lambert Cabernet Franc"), NDVI correlated well with pH and berry weight. SM showed consis- tent patterns in both vintages, whereby the north side had low values and the south (southeast) had high values. All berry compo- sition variables exhibited very high temporal consistency in both years and were inversely corre- lated with SM and somewhat with NDVI. Moran's I spatial autocor- relation analysis indicated that NDVI was a clustered variable in most blocks. In Lambert Riesling (see "Lam- bert Riesling Vineyard"), principal components analysis (PCA) ex- plained 45.5% of the variability in LAMBERT CABERNET FRANC Individual values on maps from 2015 represent highest and lowest values for the respective color zones. Individual points on maps represent the sentinel vines. NDVI Soil moisture (%) pH 0.72-0.74 0.76-0.77 Berry weight (g) Color (OD520) Anthocyanins (mg/L) 11.6-14.56 19.5-22.7 3.30 3.56-3.66 13.94-19.57 5.87-10.65 618-870