Comparison of Geonics EM38 and Dualem 1S electromagnetic induction sensors for the measurement of salinity and other soil properties

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dc.contributor.authorUrdánoz Melado, Vicente
dc.contributor.authorAragüés Lafarga, Ramón
dc.date.accessioned2012-03-27T11:39:29Z
dc.date.available2012-03-27T11:39:29Z
dc.date.issued2012
dc.description.abstractThe electromagnetic induction (EMI) Geonics EM38 (G-EM38) and Dualem 1S (D-1S) sensors are used frequently for assessment of soil salinity and other soil characteristics in irrigated agriculture. We compared these two sensors to determine whether they could be used interchangeably for the measurement of apparent soil electrical conductivity (ECa) in horizontal (ECa-h) and vertical (ECa-v) coil receiver modes. Readings were taken at 201 locations identified in three irrigation districts in both modes, and statistical comparisons were made on the raw data and from maps of a 2-ha irrigated field made using 1680 horizontal mode readings. Both sensors gave the same ECa-v readings (mean GEM38 and D-1S difference = 0), whereas the ECa-h readings were slightly greater with the Geonics EM38 than with the Dualem D-1S (mean difference = 0.075 and 0.05 dS ⁄m for the 201 and 1680 observations, respectively). The degree of coincidence between both sensors for soil profile ECa classification was acceptable: 82% for normal profiles (i.e. ECa-h ⁄ ECa-v < 0.9) and 90% for inverted profiles (i.e. ECa-h ⁄ ECa-v > 1.1). In practical terms, Geonics EM38 and Dualem 1S sensors could be used interchangeably with similar or very close resultses_ES
dc.description.statementofresponsibilityThis study was partially supported by the European Commission (Qualiwater project INCO-CT-2005-015031) and by an INIA (Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria, Spain) doctoral fellowship given to V. Urdanoz. We kindly acknowledge the technical assistance of N. Claverı´a, M. Izquierdo, J. Gaudo´ and D. Naval
dc.identifier.citationV. Urdanoz; R. Aragüés. "Comparison of Geonics EM38 and Dualem 1S electromagnetic induction sensors for the measurement of salinity and other soil properties". Soil use and management. 2012, vol. 28, p. 108-112
dc.identifier.issn0266-0032
dc.identifier.urihttp://hdl.handle.net/10532/1829
dc.language.isoenes_ES
dc.relation.publisherversiondoi: 10.1111/j.1475-2743.2011.00386.x
dc.subjectSoil apparent electrical conductivityes_ES
dc.subjectElectromagnetic inductiones_ES
dc.subjectSoil profile classificationes_ES
dc.subjectSoil mappinges_ES
dc.subjectSoil classificationes_ES
dc.subjectSoil use and managementes_ES
dc.subject.otherSensores
dc.subject.otherSalinidad del suelo
dc.subject.otherManejo del suelo
dc.subject.otherCaracterísticas morfológicas suelo
dc.subject.otherSuelos y riegoses_ES
dc.titleComparison of Geonics EM38 and Dualem 1S electromagnetic induction sensors for the measurement of salinity and other soil propertieses_ES
dc.typeArticlees_ES

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