Abstract
The present study illustrates an operational approach estimating individual and aggregate vineyards’ canopy volume estimation through three years Tree-Row-Volume (TRV) measurements and remotely sensed imagery acquired with unmanned aerial vehicle (UAV) Red-Green-Blue (RGB) digital camera, processed with MATLAB scripts, and validated through ArcGIS tools. The TRV methodology was applied by sampling a different number of rows and plants (per row) each year with the aim of evaluating reliability and accuracy of this technique compared with a remote approach. The empirical results indicate that the estimated tree-row-volumes derived from a UAV Canopy Height Model (CHM) are up to 50% different from those measured on the field using the routinary technique of TRV in 2019. The difference is even much higher in the two 2016 dates. These empirical findings outline the importance of data integration among techniques that mix proximal and remote sensing in routine vineyards’ agronomic practices, helping to reduce management costs and increase the environmental sustainability of traditional cultivation systems.
Highlights
Precision farming techniques assume the optimal use of inputs to improve production efficiency and sustainability [1,2,3,4]
A more efficient use of plant protection products and tools leads to fewer pollution loads to rural environments, higher crop quality, less monetary costs, and increased production rates, impacting the economic and ecological sustainability of farms in a positive manner [5,6,7,8,9,10]
Comboth dates in 2016 and slightly different in 2019. These discrepancies may conf pared to TRV results, the remote sensing data appeared different at both dates in 2016 and reliability and precision of the may digital model to obtain slightly different in 2019
Summary
Precision farming techniques assume the optimal use of inputs to improve production efficiency and sustainability [1,2,3,4]. The Tree-Row-Volume (TRV) technique, requiring manual measurements of the vineyard, estimates the total plant volume by ground unit (m3 ha−1 ) in vineyard crown height, width, and inter-row distance [23,24,25,26]. TRV is relatively well known to grape growers and agronomists. This method has been extensively used for various purposes, including (rough) estimation of the adequate dosage treatment for plant protection within a specific vineyard, leading to a more comprehensive management of the canopy. Other volume measurement systems such as leaf wall area (LWA) and Unit Canopy Row (UCR)
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