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            <name>Title</name>
            <description>A name given to the resource</description>
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                <text>Agricultura sostenible</text>
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            <description>An account of the resource</description>
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                <text>Dominio científico: Agricultura sostenible</text>
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          <name>Title</name>
          <description>A name given to the resource</description>
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              <text>Artificial Neural Network to Predict Vine Water Status Spatial Variability Using Multispectral Information Obtained from an Unmanned Aerial Vehicle (UAV)</text>
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          <name>Creator</name>
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              <text>Tomas Poblete, Samuel Ortega-Farías, Miguel Angel Moreno, Matthew Bardeen</text>
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          <name>Description</name>
          <description>An account of the resource</description>
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              <text>Water stress, which affects yield and wine quality, is often evaluated using the midday stem water potential (Ψstem). However, this measurement is acquired on a per plant basis and does not account for the assessment of vine water status spatial variability. The use of multispectral cameras mounted on unmanned aerial vehicle (UAV) is capable to capture the variability of vine water stress in a whole field scenario. It has been reported that conventional multispectral indices (CMI) that use information between 500–800 nm, do not accurately predict plant water status since they are not sensitive to water content. The objective of this study was to develop artificial neural network (ANN) models derived from multispectral images to predict the Ψstem spatial variability of a drip-irrigated Carménère vineyard in Talca, Maule Region, Chile. The coefficient of determination (R2) obtained between ANN outputs and ground-truth measurements of Ψstem were between 0.56–0.87, with the best performance observed for the model that included the bands 550, 570, 670, 700 and 800 nm. Validation analysis indicated that the ANN model could estimate Ψstem with a mean absolute error (MAE) of 0.1 MPa, root mean square error (RMSE) of 0.12 MPa, and relative error (RE) of −9.1%. For the validation of the CMI, the MAE, RMSE and RE values were between 0.26–0.27 MPa, 0.32–0.34 MPa and −24.2–25.6%, respectively.</text>
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          <name>Date</name>
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              <text>2017</text>
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          <name>Subject</name>
          <description>The topic of the resource</description>
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              <text>Artificial neural network, UAV, midday stem water potential, multispectral image processing</text>
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          <name>Identifier</name>
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              <text>10.3390/s17112488</text>
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          <name>Source</name>
          <description>A related resource from which the described resource is derived</description>
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            <elementText elementTextId="167674">
              <text>Sensors</text>
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          <name>Publisher</name>
          <description>An entity responsible for making the resource available</description>
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              <text>MDPI AG</text>
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          <name>Coverage</name>
          <description>The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant</description>
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              <text>Chemical technology</text>
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          <description>A related resource</description>
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              <text>&lt;a href="https://www.mdpi.com/1424-8220/17/11/2488" target="_blank" rel="noreferrer noopener"&gt;https://www.mdpi.com/1424-8220/17/11/2488&lt;/a&gt;</text>
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