Use of vegetation indices from Sentinel2 and UAV in precision viticulture applications
Contributo in Atti di convegno
Data di Pubblicazione:
2022
Citazione:
Use of vegetation indices from Sentinel2 and UAV in precision viticulture applications / B. Ortuani, A. Mayer, G. Sona, A. Facchi - In: D-SITE Drones - Systems of Information on Cultural Heritage for a spatial and social investigation / [a cura di] S. Parrinello, S. Barba, A. Dell’Amico, A. di Filippo. - [s.l] : Pavia University Press, 2022 Jun. - ISBN 978-88-6952-159-1. - pp. 583-587 (( convegno D-SITE Drones - Systems of Information on culTural hEritage tenutosi a Pavia nel 2022.
Abstract:
Precision viticulture is based on information related to the within field variability of the crop soil sys-
tem; this information is used to optimize input supply and management practices, to improve grape
quality and yield. Technological tools are available to accurately investigate this variability, through
remotely or proximal sensed data. Geophysical surveys are usually employed to investigate soil
variability, while canopy variability is monitored through multispectral imagery. In the latter case,
vegetation indices are computed from measurements acquired with sensors mounted on different
platforms, from sat ellite to unmanned aerial vehicle ( and quad. Sentinel 2 data are free and
readily available, while UAV data hav e a cost for both acquisition and processing. Conversely, spatial
resolution increases from Sentinel 2 (10 m) to UAV (few centimetres) data. The accuracy in crop
row monitoring provided by UAV is required for a site specific and variable rate management of
agronomic inputs, or to assess whether a certain intervention has reached the goal
However
a variable rate irrigation management is often operated not looking at the crop variability
in a certain date but mainly considering the soil variability, since soil is the reservoir from which the
roots get their water supply. Even though g eophysical methods are the ref erence tools to delineat e
the agronomic management zones ( from soil maps also multispectral images time series can
be used As multispectral imag es describe crop variability both in space and time, multi temporal
images can be used to extract time stationary components, mainly related to soil variability rather
than to time vari able factors as plant diseases or agro-meteorological conditions.
This
research focuses primarily on compari ng Sentinel 2 and UAV data acquired in drip irrig ated
vineyards to assess their ability to describe the vine vigour along the rows. Secondly, after demon-
strating how Sentinel 2 data are more correlated with the grass inter row vigour strongly affected
by soil properties, as grass is not irrigated than with the vine condition the use of Sentinel 2 multi
temporal images to delineate MZs is explored. Both objectives were pursued on datasets acquired
in the Colli Morenici region (south of Lake Garda, Italy).
Tipologia IRIS:
03 - Contributo in volume
Keywords:
precision irrigation; remote sensing; agr icultural management zone principal component analysis
Elenco autori:
B. Ortuani, A. Mayer, G. Sona, A. Facchi
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Link al Full Text:
Titolo del libro:
D-SITE Drones - Systems of Information on Cultural Heritage for a spatial and social investigation