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Proper Use of Aerial Diagnostic Maps to Improve Vineyard Performance

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You’ve probably heard of NDVI (Normalized Difference Vegetation Index) or EVI (Enhanced Vegetation Index) maps, which are helpful in understanding the relative health of grapevines. Typically generated from multispectral imagery gathered by satellites, airplanes or drones, these maps are based on the principle that healthy plants reflect less red visible light than unhealthy plants because healthy plants absorb more of it as they are engaged in higher rates of photosynthesis.