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dc.contributor.authorCampbell, Alistair Shand
dc.date.accessioned2010-04-27T03:01:57Z
dc.date.available2010-04-27T03:01:57Z
dc.date.issued1975
dc.identifier.urihttps://hdl.handle.net/10182/1759
dc.description.abstractChanges brought about by chemical and physical weathering were investigated in a chronosequence of terrace soils near Reefton, New Zealand. The parent materials of the soil, which ranged in age from about 1000 to over 130,000 years were outwash gravels, sands and silts derived from granite (dominant) and indurated sandstone. Variations in pH, organic matter, particle size, cation exchange properties, total Mg, Al, Si, K, Ca, Fe and Ti, poorly-ordered and organic-complexed forms of Al and Fe, and mineralogy caused by increasing duration of weathering and by short range, short term variations in the intensity of the biotic factor were determined. It was concluded that the younger soils represented dynamic systems in which alternative weathering cycles could replace each other as the growth, death and eventual disappearance of individual red beech trees caused localised fluctuations in pH. It was further concluded that these processes would lead ultimately to the formation of gley podzols as are now found on the two oldest surfaces p and that podzolisation preceded gleying. Attempts were made to determine if minerals of the plumbogummite group were responsible for the high proportion of soil phosphate from these soils that, on fractionation, appeared in the residual P fraction. It was found that attempts to concentrate these minerals by prolonged digestion with HF resulted in their solution, and in precipitation of complex fluorides that yielded diffraction spacings that have been mistaken for minerals of the plumbogummite group.en
dc.language.isoenen
dc.publisherLincoln College, University of Canterburyen
dc.rights.urihttps://researcharchive.lincoln.ac.nz/page/rights
dc.subjectNew Zealanden
dc.subjectReeftonen
dc.subjectchemical propertiesen
dc.subjectmineralogical propertiesen
dc.subjectsoil pHen
dc.subjectorganic matteren
dc.subjectsoil-forming factorsen
dc.subjectfractionationen
dc.subjectsoil sequencesen
dc.titleChemical and mineralogical properties of a sequence of terrace soils near Reefton, New Zealanden
dc.typeThesisen
thesis.degree.grantorUniversity of Canterburyen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciences::300103 Soil chemistryen
dc.subject.marsdenFields of Research::300000 Agricultural, Veterinary and Environmental Sciences::300100 Soil and Water Sciences::300101 Soil physicsen
lu.thesis.supervisorWalker, T. W.
lu.contributor.unitDepartment of Soil and Physical Sciencesen


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