Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/13656
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dc.contributor.authorMcLaren, Timothy Ianen
dc.contributor.authorGuppy, Christopheren
dc.contributor.authorTighe, Matthewen
dc.contributor.authorBell, Michaelen
dc.contributor.authorRochester, Ianen
dc.date.accessioned2013-11-18T14:50:00Z
dc.date.created2013en
dc.date.issued2013en
dc.identifier.urihttps://hdl.handle.net/1959.11/13656en
dc.description.abstractVertosols are an important soil type used for cotton production in the northern grains region (NGR) of eastern Australia. Historically, cotton has received minimal phosphorus (P) input due to the high fertility of Vertosols. Over the past 30 years, P fertiliser use in the cotton industry has increased six-fold, due to the perceived decline in soil fertility in the NGR. However, when P is applied to cotton systems, the amount of P fertiliser recovered by the crop (PUE) has been low and unpredictable (0 - 67 %), and few studies have investigated why this is so. The unpredictability of PUE in cotton systems refers to the lack of cotton response when P fertiliser has been applied in some soils, which was based on recommendations from the commonly used Colwell soil P test. Long-term field trials suggest the quantity of readily available P measured using the Colwell extractant is being replenished by other soil phosphates not measured by the Colwell extractant. This may be due to the large amounts of Ca phosphates typically found in Vertosols, which may supply or replenish labile soil P pools in the 0 - 10 cm and 10 - 30 cm layers. Recent studies have used a dilute acid test (colloquially referred to as the BSES extractant) to measure Ca phosphates in Vertosols, however, little is known about the P pools removed by this extractant. The aim of this project was to understand the ability of Ca phosphates to supply or replenish plant available P in the cotton systems of the NGR.en
dc.languageenen
dc.titleThe Form and Availability of Slowly Available Phosphorus in Depleted Vertosolsen
dc.typeThesis Doctoralen
dcterms.accessRightsUNE Greenen
dc.subject.keywordsSoil Chemistry (excl Carbon Sequestration Science)en
local.contributor.firstnameTimothy Ianen
local.contributor.firstnameChristopheren
local.contributor.firstnameMatthewen
local.contributor.firstnameMichaelen
local.contributor.firstnameIanen
local.subject.for2008050304 Soil Chemistry (excl Carbon Sequestration Science)en
local.subject.seo2008829899 Environmentally Sustainable Plant Production not elsewhere classifieden
dcterms.RightsStatementCopyright 2013 - Timothy Ian McLarenen
dc.date.conferred2013en
local.thesis.degreelevelDoctoralen
local.thesis.degreenameDoctor of Philosophyen
local.contributor.grantorUniversity of New Englanden
local.profile.schoolEnvironmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emailtmclare2@une.edu.auen
local.profile.emailcguppy@une.edu.auen
local.profile.emailmtighe2@une.edu.auen
local.profile.emailm.bell4@uq.edu.auen
local.profile.emailirochest@une.edu.auen
local.output.categoryT2en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune_thesis-20130223-181721en
local.access.fulltextYesen
local.contributor.lastnameMcLarenen
local.contributor.lastnameGuppyen
local.contributor.lastnameTigheen
local.contributor.lastnameBellen
local.contributor.lastnameRochesteren
dc.identifier.staffune-id:tmclare2en
dc.identifier.staffune-id:cguppyen
dc.identifier.staffune-id:mtighe2en
dc.identifier.staffune-id:irochesten
local.profile.orcid0000-0001-7274-607Xen
local.profile.roleauthoren
local.profile.rolesupervisoren
local.profile.rolesupervisoren
local.profile.rolesupervisoren
local.profile.rolesupervisoren
local.identifier.unepublicationidune:13868en
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
dc.identifier.academiclevelAcademicen
local.title.maintitleThe Form and Availability of Slowly Available Phosphorus in Depleted Vertosolsen
local.output.categorydescriptionT2 Thesis - Doctorate by Researchen
local.description.statisticsepubsVisitors: 364<br />Views: 356<br />Downloads: 47en
local.thesis.borndigitalyesen
local.search.authorMcLaren, Timothy Ianen
local.search.supervisorGuppy, Christopheren
local.search.supervisorTighe, Matthewen
local.search.supervisorBell, Michaelen
local.search.supervisorRochester, Ianen
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/5e610c18-f0c4-4004-a6b6-776ed446e976en
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/d9fcbac9-bde8-428b-8fcf-7f8101759bf5en
local.open.fileurlhttps://rune.une.edu.au/web/retrieve/86ed9f22-e73d-4828-b651-fecd98c0158cen
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