Measurement of Low Matric Potentials with Porous Matrix Sensors and Water-Filled Tensiometers

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dc.contributor.authorWhalley, W. R.
dc.contributor.authorLock, G.
dc.contributor.authorJenkins, M.
dc.contributor.authorPeloe, T.
dc.contributor.authorBurek, K.
dc.contributor.authorBalendonck, J.
dc.contributor.authorTake, W. A.
dc.contributor.authorTuzel, I. H.
dc.contributor.authorTuzel, Y.
dc.date.accessioned2019-10-27T21:20:04Z
dc.date.available2019-10-27T21:20:04Z
dc.date.issued2009
dc.departmentEge Üniversitesien_US
dc.description.abstractWater-filled tensiometers are widely used to measure the matric potential of sod water. It is often assumed that, because these give a direct reading, they are accurate. With a series of laboratory tests with model laboratory systems of increasing complexity we show that the output of water-filled tensiometers can, particularly in drying sods, be in serious error. Specifically, we demonstrated that water-filled tensiometers can indicate a steady matric potential, typically between -60 and -90 kPa, when the sod is much drier. We demonstrate the use of water-filled tensiometers that can measure matric potentials smaller than -100 kPa in the laboratory and in the field. The physics of the failure of water-filled tensiometers is discussed. When the matric potential was greater than -60 kPa, in laboratory and field tests water-filled and porous matrix sensors were in good agreement. In the field environment the porous matrix sensor was useful because it allowed early detection of the failure of water-filled tensiometers. In dry soils (matric potential < -60 kPa) the porous matrix sensor was more reliable and accurate than the water-filled tensiometer.en_US
dc.description.sponsorshipEuropean UnionEuropean Union (EU) [036958]; UK, Biotechnology and Biological Sciences Research CouncilBiotechnology and Biological Sciences Research Council (BBSRC); Biotechnology and Biological Sciences Research CouncilBiotechnology and Biological Sciences Research Council (BBSRC) [BBS/E/C/00004861]en_US
dc.description.sponsorshipThis project was part funded by the European Union project FLOW-AID (036958). Rothamsted Research is grant-aided by the UK, Biotechnology and Biological Sciences Research Council.en_US
dc.identifier.doi10.2136/sssaj2008.0400
dc.identifier.endpage1803en_US
dc.identifier.issn0361-5995
dc.identifier.issn0361-5995en_US
dc.identifier.issue6en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1796en_US
dc.identifier.urihttps://doi.org/10.2136/sssaj2008.0400
dc.identifier.urihttps://hdl.handle.net/11454/44240
dc.identifier.volume73en_US
dc.identifier.wosWOS:000271752700005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.language.isoenen_US
dc.publisherSoil Sci Soc Ameren_US
dc.relation.ispartofSoil Science Society of America Journalen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.titleMeasurement of Low Matric Potentials with Porous Matrix Sensors and Water-Filled Tensiometersen_US
dc.typeArticleen_US

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