Aggregate hierarchy and carbon mineralization in two Oxisols of New South Wales, Australia

S. M.Fazle Rabbi; Brian R. Wilson; Peter V. Lockwood; Heiko Daniel; Iain M. Young

doi:10.1016/j.still.2014.10.008

Aggregate hierarchy and carbon mineralization in two Oxisols of New South Wales, Australia

S. M.Fazle Rabbi, Brian R. Wilson, Peter V. Lockwood, Heiko Daniel, Iain M. Young

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

The conventional model of aggregate formation suggests a hierarchy where micro-aggregates with lower porosity and therefore reduced soil organic carbon (SOC) mineralization form inside macro-aggregates. This model has however been questioned for highly weathered Oxisols where inconclusive results regarding the presence of aggregate hierarchy have been obtained to date. We hypothesized that in Oxisols (i) an aggregate hierarchy would be present (ii) the porosity of micro-aggregates would be lower than that of macro-aggregates and (iii) pore geometry of aggregates would influence SOC mineralization. We collected topsoils from Oxisols in northern New South Wales, Australia from which macro-aggregates (>250μm), micro-aggregates (53-250μm) and

Original language	English (US)
Pages (from-to)	193-203
Number of pages	11
Journal	Soil and Tillage Research
Volume	146
Issue number	PB
DOIs	https://doi.org/10.1016/j.still.2014.10.008
State	Published - Mar 1 2015
Externally published	Yes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-02-15

ASJC Scopus subject areas

Earth-Surface Processes
Soil Science
Agronomy and Crop Science

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abstract = "The conventional model of aggregate formation suggests a hierarchy where micro-aggregates with lower porosity and therefore reduced soil organic carbon (SOC) mineralization form inside macro-aggregates. This model has however been questioned for highly weathered Oxisols where inconclusive results regarding the presence of aggregate hierarchy have been obtained to date. We hypothesized that in Oxisols (i) an aggregate hierarchy would be present (ii) the porosity of micro-aggregates would be lower than that of macro-aggregates and (iii) pore geometry of aggregates would influence SOC mineralization. We collected topsoils from Oxisols in northern New South Wales, Australia from which macro-aggregates (>250μm), micro-aggregates (53-250μm) and",

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AU - Rabbi, S. M.Fazle

AU - Wilson, Brian R.

AU - Lockwood, Peter V.

AU - Daniel, Heiko

AU - Young, Iain M.

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Aggregate hierarchy and carbon mineralization in two Oxisols of New South Wales, Australia

Abstract

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