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Counterions, smectite, and palygorskite increase microstructural stability of saline-sodic soils

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dc.contributor.authorJavaheri, F.en
dc.contributor.authorEsfandiarpour-Boroujeni, Isaen
dc.contributor.authorFarpoor, Mohammad Hadyen
dc.contributor.authorHolthusen, D.en
dc.contributor.authorStewart, Ryan D.en
dc.date.accessioned2021-12-05T19:54:24Zen
dc.date.available2021-12-05T19:54:24Zen
dc.date.issued2022-02-01en
dc.date.updated2021-12-05T19:54:19Zen
dc.description.abstractSaline-sodic soils are susceptible to wind and water erosion when the dispersive effect of sodium overcomes inter-particle bonds. Rheological parameters of viscoelasticity can help to quantify inter-particle attractive forces and account for the effect of salinity in these soils. The main objective of the present study was to investigate the viscoelasticity behavior of saline-sodic soils of the Sirjan playa in south-central Iran. Three representative pedons were excavated and described by horizon. Soil physicochemical properties and rheological properties were determined, namely the micromechanical parameters flow point (γf), loss factor tan δ, and integral z, with samples analyzed at three matric potentials (0, −6, and −15 kPa). Results showed that soil microstructural stiffness was mainly influenced by soil texture, clay minerals, gypsum, calcium carbonate equivalent (CCE), and matric potential. The dispersive effect of sodium, as indicated by low integral z and γf values, decreased with increasing gypsum content in − 6 and − 15 kPa matric potentials (0.6 < r < 0.8) and CCE percentage in the quasi-saturated (0 kPa) condition (r > 0.8). However, greater microstructural stability (i.e., higher integral z and γf) was observed for fine-textured soils with relatively high amounts of smectite and palygorskite and low pH. Furthermore, integral z and γf increased with lower matric potentials due to the stabilizing effect of menisci forces. Therefore, the viscoelastic behavior of the saline-sodic soils was negatively associated with water content and high sodium concentration, while the presence of smectite, palygorskite, gypsum, and CCE improved the soil physical conditions and thus the rigidity of the porous system. These results demonstrate that rheological measurements can identify saline-sodic soils that have strongly degraded microstructural stability and would most benefit from active management and amelioration.en
dc.description.versionAccepted versionen
dc.format.extentPages 105258-105258en
dc.format.mimetypeapplication/pdfen
dc.identifier105258 (Article number)en
dc.identifier.doihttps://doi.org/10.1016/j.still.2021.105258en
dc.identifier.issn0167-1987en
dc.identifier.orcidStewart, Ryan [0000-0002-9700-0351]en
dc.identifier.urihttp://hdl.handle.net/10919/106840en
dc.identifier.volume216en
dc.language.isoenen
dc.publisherElsevieren
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject05 Environmental Sciencesen
dc.subject06 Biological Sciencesen
dc.subject07 Agricultural and Veterinary Sciencesen
dc.subjectAgronomy & Agricultureen
dc.titleCounterions, smectite, and palygorskite increase microstructural stability of saline-sodic soilsen
dc.title.serialSoil and Tillage Researchen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.otherJournal Articleen
pubs.organisational-group/Virginia Techen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciencesen
pubs.organisational-group/Virginia Tech/University Research Institutesen
pubs.organisational-group/Virginia Tech/University Research Institutes/Fralin Life Sciencesen
pubs.organisational-group/Virginia Tech/All T&R Facultyen
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/CALS T&R Facultyen
pubs.organisational-group/Virginia Tech/University Research Institutes/Fralin Life Sciences/Durelle Scotten
pubs.organisational-group/Virginia Tech/Agriculture & Life Sciences/School of Plant and Environmental Sciencesen

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