Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/6657
Title: Impact of land use variation on soil C change in different agricultural soils in NW New South Wales, Australia
Contributor(s): Ghosh, Subhadip (author); Wilson, Brian  (author)orcid ; Kristiansen, Paul  (author)orcid ; Barnes, Phoebe  (author); King, Dacre (author)
Publication Date: 2009
Handle Link: https://hdl.handle.net/1959.11/6657
Abstract: Soils are an important reservoir of terrestrial carbon (C) and can be a source or sink of atmospheric C depending upon management practices. There is increasing international interest in quantifying the magnitude and resilience of this sink. Land-use change can affect C storage and turnover in soils by altering the soil environment. This can also have a profound impact on the sustainability of farming systems and C sequestration or C losses from soil. Change in land use typically results in different rates of erosion, aggregate formation, biological activity and drainage, which will have a significant impact on soil organic carbon (SOC) accumulation. Differing land uses have variable impact on SOC pool and fluxes. For example, decline in SOC under cropping or grazing can be attributed to reduced inputs of organic matter, increased decomposability of crop residues, and tillage effects that decrease the amount of physical protection to decomposition. A system of paired plots have been established in three major soil types (basalt, metasediment and granite) across north-western New South Wales, Australia, through state wide soil monitoring program in order to determine the direction and magnitude of soil C changes associated with major land use change i.e. cropping, native pasture, improved pasture and woodland. Ten random samples were collected from a 25 x 25 m plots at four different depths (to 30 cm) from each land-use which were in close proximity having identical soil type, slope, aspect and elevation. Total soil organic carbon in the surface 10 cm decreased in the order of woodland > native pasture > improved pasture > cropping soils for all three soil types. However, the site variation was large and changes in surface total soil carbon was not significantly different between improved pasture and cropped soils.
Publication Type: Conference Publication
Conference Details: International Symposium on Soil Organic Matter Dynamics: Land Use, Management and Global Change, Colorado Springs, United States of America, 6th - 9th July, 2009
Source of Publication: International Symposium on Soil Organic Matter Dynamics: Land Use, Management and Global Change - Book of Abstracts, p. 96-96
Publisher: Colorado State University, Natural Resource Ecology Laboratory
Place of Publication: online
Fields of Research (FoR) 2008: 050399 Soil Sciences not elsewhere classified
Socio-Economic Objective (SEO) 2008: 961402 Farmland, Arable Cropland and Permanent Cropland Soils
HERDC Category Description: E3 Extract of Scholarly Conference Publication
Publisher/associated links: http://www.nrel.colostate.edu/images/stories/SOMcolorado/Program_abstract%20book_rev_Aug18.pdf
http://www.nrel.colostate.edu/images/stories/SOMcolorado/SOM09_Subhadip_Ghosh.pdf
http://www.nrel.colostate.edu/program.html
Appears in Collections:Conference Publication

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