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dc.contributor.authorGil Moya, Emilio
dc.contributor.authorEscolà i Agustí, Alexandre
dc.contributor.authorRosell Polo, Joan Ramon
dc.contributor.authorPlanas de Martí, Santiago
dc.contributor.authorVal, Luis
dc.date.accessioned2016-02-10T10:42:51Z
dc.date.available2016-02-10T10:42:51Z
dc.date.issued2007
dc.identifier.issn0261-2194
dc.identifier.urihttp://hdl.handle.net/10459.1/49468
dc.description.abstractThe changes in the shape and size of vines during the growing season require a continuous adjustment of the applied dose to optimize spray application efficiency. Target detection with ultrasonic sensors can be used to adapt the applied dose following the principles of the variable rate technology. A multi-nozzle air-blast sprayer was fitted with three ultrasonic sensors and three electro-valves, to modify the flow rate from the nozzles in real time, in relation to the variability of crop width. A constant application rate of 300 l ha−1 was compared with a variable rate application using the tree row volume principle at a 0.095 l m−3 canopy. The total flow rate sprayed by the nozzles was modified according to the variations of crop width measured by the ultrasonic sensors. On average 58% less liquid was applied compared to the constant rate application, with similar deposition on leaves with both treatments. A detailed analysis of savings indicates differences between the lower, middle and top part of the crop, in accordance with the leaf area distribution with crop height. No significant differences between treatments were detected in uniformity of liquid distribution and capability to reach the inner parts of the crop. This important reduction in spray volume could be followed by an equivalent reduction of plant protection products but further research work is needed to guarantee biological efficacy of a reduced dose.ca_ES
dc.description.sponsorshipThis work was funded by the Spanish Ministry of Education and Science, and it is part of the funded research project AGL2002-04260-C04-03ca_ES
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relationMICYT/PN2000-2003/AGL2002-04260-C04-03ca_ES
dc.relation.isformatofVersió postprint del document publicat a https://doi.org/10.1016/j.cropro.2006.11.003ca_ES
dc.relation.ispartofCrop Protection, 2007, vol. 26, núm. 8, p. 1287-1297ca_ES
dc.rights(c) Elsevier, 2007ca_ES
dc.subjectSprayca_ES
dc.subjectVineyardca_ES
dc.subjectVariable rateca_ES
dc.subjectElectronic controlca_ES
dc.subject.otherVinyaca_ES
dc.subject.otherSensorsca_ES
dc.subject.otherPolvorització (Agricultura)ca_ES
dc.titleVariable rate application of plant protection products in vineyard using ultrasonic sensorsca_ES
dc.typearticleca_ES
dc.identifier.idgrec010246
dc.type.versionacceptedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1016/j.cropro.2006.11.003


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