FAQ: Frequently asked questions
What is the Plant Cell Density Index (PCD)?
PCD, also known as the Simple Ratio Index, is a well-known remote sensing index used to characterise the relative health and biomass status of vegetation. Healthy, vigorous vine biomass will exhibit a strong near infrared (NIR) reflectance and a very low red (R) reflectance due to chlorophyll absorption:
Plant Cell Density = (NIR 780nm / Red 675nm)
What does this mean in the vineyard?
Low PCD | High PCD | |
Leaf and vine characterstics | Lower vigour, greater plant stress, leaf senescence, thinner canopy | Higher vigour, new shoots, green healthy leaves, fuller canopy |
Fruit characteristics | Potentially lower yield and higher quality fruit composition, even berry ripeness | Potentially higher yield and lower fruit composition, uneven berry ripeness |
Possible reasons |
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Need help interpreting your V3 Maps for field management or harvest plans? Contact us and we will refer you to your nearest precision viticulture consultant. |
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