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dc.contributor.authorTEIXEIRA, D. D. B.
dc.contributor.authorMARQUES JUNIOR, J.
dc.contributor.authorSIQUEIRA, D. S.
dc.contributor.authorVASCONCELOS, V.
dc.contributor.authorCARVALHO JUNIOR, O. A.
dc.contributor.authorMARTINS, E. de S.
dc.contributor.authorPEREIRA, G. T.
dc.date.accessioned2018-10-04T00:47:10Z-
dc.date.available2018-10-04T00:47:10Z-
dc.date.created2018-10-03
dc.date.issued2018
dc.identifier.citationCatena, v. 164, 2018.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1096768-
dc.descriptionThis study aimed to use spatial uncertainty of magnetic susceptibility (MS) and clay content to improve soil- mapping units. In an experimental area of 870 ha, a regular sampling grid containing 371 points was set, in which MS and clay content were assessed at a depth range of 0–0.25 m. Using a digital elevation model and field observations, a 4440-m transect was established on the study area from hilltop to the foothill, toward the gentlest slope. Standard deviation maps based on 200 realizations of the sequential gaussian simulation mea- sured spatial estimate uncertainties. To limit transition zones along the transect, uncertainty isolines re- presentative of the transition between soil-mapping units were selected. Both attributes presented peaks of uncertainties near the change of mapping units, previously known. Uncertainty zones, previously delineated, ranged from 45 to 210 m and from 60 to 170 m, for MS and clay content, respectively. However, after extra- polating the uncertainties to the side of the transect, amplitude changes of the uncertainty zones were observed, especially in the transition regions between landscape shape and geology. Delineation of mapping units, which incorporated the uncertainties of MS and clay content, was similar. However, due to lower cost and promptness, MS becomes the most feasible alternative. Knowing spatial uncertainties enables readjusting limits in maps of soil-mapping units and may support identification of most favorable regions for determining modal pedon re- presentative of each unit.eng
dc.language.isoengpt_BR
dc.rightsopenAccesspt_BR
dc.subjectGeoestatística
dc.subjectMapeamento do solo
dc.subjectPedometria
dc.titleMapping units based on spatial uncertainty of magnetic susceptibility and clay content.
dc.typeArtigo de periódico
dc.date.updated2018-11-20T11:11:11Zpt_BR
dc.subject.thesagroPedologia
dc.format.extent2p. 79-87.
riaa.ainfo.id1096768
riaa.ainfo.lastupdate2018-11-20 -02:00:00
dc.contributor.institutionD. D. B. TEIXEIRA, UNIVERSIDADE DE MARÍLIA
dc.contributor.institutionJOSÉ MARQUES JUNIOR, UNIVERSIDADE ESTADUAL DE SÃO PAULOeng
dc.contributor.institutionDIEGO S. SIQUEIRA, UNIVERSIDADE ESTADUAL DE SÃO PAULOeng
dc.contributor.institutionVINICIUS VASCONCELOS, UNIVERSIDADE DE BRASÍLIAeng
dc.contributor.institutionOSMAR A. CARVALHO JUNIOR, UNIVERSIDADE DE BRASÍLIAeng
dc.contributor.institutionEDER DE SOUZA MARTINS, CPACeng
dc.contributor.institutionGENER T. PEREIRA, UNIVERSIDADE ESTADUAL DE SÃO PAULO.eng
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