title: Using an automatic resistivity profiler soil sensor on-the-go in precision viticulture.
abstract: Spatial information on vineyard soil properties can be useful in precision viticulture. In this paper a combination of high resolution soil spatial information of soil electrical resistivity (ER) and ancillary topographic attributes, such as elevation and slope, were integrated to assess the spatial variability patterns of vegetative growth and yield of a commercial vineyard (Vitis vinifera L. cv. Tempranillo) located in the wine-producing region of La Rioja, Spain. High resolution continuous geoelectrical mapping was accomplished by an Automatic Resistivity Profiler (ARP) on-the-go sensor with an  on-board GPS system; rolling electrodes enabled ER to be measured for a depth of investigation approximately up to 0.5, 1 and 2 m. Regression analysis and cluster analysis algorithm were used to jointly process soil resistivity data, landscape attributes and grapevine variables. ER showed a structured variability that matched well with trunk circumference spatial pattern and yield. Based on resistivity and a simple terrain attribute uniform management units were delineated. Once a spatial relationship to target variables is found, the integration of point measurement with continuous soil resistivity mapping is a useful technique to identify within-plots areas of vineyard with similar status.
authors: Sistemi Colturali degli Ambienti Caldo-Aridi, Agricultural Research Council (CRA), Via Celso Ulpiani, 5, 70125 Bari, Italy. roberta.rossi@entecra.it
authors: Roberta
authors: R
authors: Rossi
authors: Alessio
authors: A
authors: Pollice
authors: Maria-Paz
authors: MP
authors: Diago
authors: Manuel
authors: M
authors: Oliveira
authors: Borja
authors: B
authors: Millan
authors: Giovanni
authors: G
authors: Bitella
authors: Mariana
authors: M
authors: Amato
authors: Javier
authors: J
authors: Tardaguila
mesh_terms: D000383:Agriculture / Q000295:instrumentation*; D017097:Electric Impedance; D005843:Geography; D012044:Regression Analysis; D012987:Soil / Q000737:chemistry*; D013030:Spain; D027843:Vitis / Q000254:growth & development*
chemical_list: D012987:Soil