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Around The Vineyard
have a low NDVI signal and this correlates with vine References
size (measured as vine pruning weight in dorman-
cy1). Therefore, we can use NDVI sensors to spatial- 1. Taylor JA, Link K, Taft T, Jakubowski R, Joy
ly map vineyard vine size and use it in our spatial P, Martin M, Hoffman JS, Jankowski J, Bates
crop load (Y:PW ) calculation2. Each VI was ranked, TR. 2017. A Protocol to Map Vine Size in
and the paper contains a useful table of rankings. Commercial Single High-Wire Trellis Vineyards
The researchers found there was no overall winner Using “Off-the-Shelf” Proximal Canopy Sensing
VI, each performed well in at least one area. Systems. Catal Discov into Pract 2:35–47.
Conclusions & Practical Considerations 2. Taylor J, Dresser J, Hickey C, Nuske S, Bates T.
2019. Considerations on spatial crop load map-
No individual VI was found to be ‘best’ at predict- ping. Aust J Grape Wine Res 25:144–155.
ing pruning weight. Ideally, operators would have
access to a fully automated modeling software that Michelle Podolec is extension support specialist
would allow them to select the best fit for their with the statewide viticulture extension program,
vineyard from single or multi-VI applications. based at Cornell AgriTech in Geneva, NY.
Further studies would be needed to adapt an
automated modeling software to a wider variety of
vineyards, trellis systems, soils and other vineyard
traits. The authors add that there are several active
projects that are looking to identify reflectance
wavebands and/or Vis to identify other leaf “quali-
ty” attributes like nutrient or pest status.
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