A Free Precision Viticulture Tool for Identifying Representative Sampling Zones and Estimating Yield Using Smartphone. - Di Gennaro, Salvatore Filippo; Dainelli, Riccardo; Rocchi, Leandro; Toscano, Piero; Orlandi, Giorgia; Pietrantuono, Luca; Hamie, Najwane; Matese, Alessandro; Ristic, Renata (Australian Journal of Grape & Wine Research, 2026)