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dc.contributor.authorEscolà i Agustí, Alexandre
dc.contributor.authorRosell Polo, Joan Ramon
dc.contributor.authorPlanas de Martí, Santiago
dc.contributor.authorGil Moya, Emilio
dc.contributor.authorPomar Gomà, Jesús
dc.contributor.authorCamp, Ferran
dc.contributor.authorLlorens Calveras, Jordi
dc.contributor.authorSolanelles Batlle, Francesc
dc.date.accessioned2016-02-10T11:10:27Z
dc.date.available2016-02-10T11:10:27Z
dc.date.issued2013
dc.identifier.issn0168-1699
dc.identifier.urihttp://hdl.handle.net/10459.1/49470
dc.description.abstractDiscussions in recent decades about dosage models for applying plant protection products in orchards have failed to reach a compromise solution. Furthermore, canopies are spatially variable, and a uniform dose may not be adequate for the entire orchard. Spraying at an adequate volume application rate on a site-specific basis would help reduce the amount of agrochemicals used in the framework of precision horticulture and precision fructiculture. An orchard sprayer prototype running a variable-rate algorithm to adapt the volume application rate to the canopy volume in orchards on a real-time and continuous basis was designed, implemented, and validated. An equivalent prototype was designed for vineyards and described in a companion paper (‘Variable rate sprayer. Part 2 – Vineyard prototype: Design, implementation and validation’). The orchard prototype was divided into three parts: the canopy characterization system (using a LiDAR sensor), the controller executing a variable-rate algorithm, and the actuators. The controller determines the intended flow rate by using an application coefficient (required liquid volume per unit canopy volume) to convert canopy volume into a flow rate. The sprayed flow rates are adjusted via electromagnetic variable-rate valves. The goal of the prototype was to keep the actual application coefficients as close as possible to the objective. Strong relationships were observed between the intended and the sprayed flow rates (R2 = 0.935) and between the canopy cross-sectional areas and the sprayed flow rates (R2 = 0.926). In addition, when spraying in variable-rate mode, the prototype achieved significantly closer application coefficient values to the objective than those obtained in conventional spraying application mode.ca_ES
dc.description.sponsorshipThis work has been funded by the Spanish Ministry of Science and Innovation and by the European Union through the FEDER funds and is part of research projects Pulvexact (AGL2002-04260-C04-02), Optidosa (AGL2007-66093-C04-03), and Safespray (AGL2010-22304-C04-03).ca_ES
dc.language.isoengca_ES
dc.publisherElsevierca_ES
dc.relationMICYT/PN2000-2003/AGL2002-04260-C04-02ca_ES
dc.relationMIECI/PN2004-2007/AGL2007-66093-C04-03ca_ES
dc.relationMICINN/PN2008-2011/AGL2010-22304-C04-03ca_ES
dc.relation.isformatofVersió postprint del document publicat a https://doi.org/10.1016/j.compag.2013.02.004ca_ES
dc.relation.ispartofComputers and Electronics in Agriculture, 2013, vol. 95, p. 122-135ca_ES
dc.rights(c) Elsevier, 2013ca_ES
dc.subjectPrecision horticultureca_ES
dc.subjectVariable rateca_ES
dc.subjectLiDAR sensorca_ES
dc.subjectOrchard sprayerca_ES
dc.subject.otherPolvorització (Agricultura)ca_ES
dc.subject.otherRadar òpticca_ES
dc.titleVariable rate sprayer. Part 1 – Orchard prototype: design, implementation and validationca_ES
dc.typearticleca_ES
dc.identifier.idgrec019635
dc.type.versionacceptedVersionca_ES
dc.rights.accessRightsinfo:eu-repo/semantics/openAccessca_ES
dc.identifier.doihttps://doi.org/10.1016/j.compag.2013.02.004


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