Variable rate dosing in precision viticulture: use of electronic devices to improve application efficiency.

By J. Llorens, E. Gil, J. Llop, A. Escolà. 2010

170 citations recorded by the source corpus.

Abstract Two different spray application methods were compared in three vine varieties at different crop stages. A conventional spray application with a constant volume rate per unit ground area (l ha −1 ) was compared with a variable rate application method designed to compensate electronically for measured variations in canopy dimensions. An air-blast sprayer with individual multi-nozzle spouts was fitted with three ultrasonic sensors and three electro valves on one side, in order to modify the emitted flow rate of the nozzles according to the variability of canopy dimensions in real time. The purpose of this prototype was to precisely apply the required amount of spray liquid and avoid over dosing. On average, a 58% saving in application volume was achieved with the variable rate method, obtaining similar or even better leaf deposits.

Subfields: Mechanical Engineering, Plant Science

View Paper: https://www.semanticscholar.org/paper/1cdb410408fc10017314a05c1dad64758a940887

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Citations in the corpus

• Intercomparison of UAV, Aircraft and Satellite Remote Sensing Platforms for Precision Viticulture (2015, methodology): “One of the most interesting VRA applications is the Variable Rate Spraying that consist in dosing the quantity of pesticides in function of the canopy volume, a technique that proved to enable an overall saving of up to 58% of application volume [26] with consequent reduction of pollution and of ope”