Impacts of Land-Use on Nitrogen Status and Mineralization in the Mulga Lands of Southern Queensland

Impacts of land-use change on nitrogen (N) status and mineralization in the Mulga Lands of Southern Queensland are investigated. In the semiarid Mulga Lands of southern Queensland soil N levels have declined after clearance of the native mulga and conversion to grazed buffel grass pasture. At three...

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Published inAustral ecology Vol. 31; no. 6; p. 708
Main Authors Mathers, Nicole J, Harms, Ben, Dalal, Ram C
Format Journal Article
LanguageEnglish
Published 01.09.2006
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Summary:Impacts of land-use change on nitrogen (N) status and mineralization in the Mulga Lands of Southern Queensland are investigated. In the semiarid Mulga Lands of southern Queensland soil N levels have declined after clearance of the native mulga and conversion to grazed buffel grass pasture. At three mulga sites, declines in soil total N range from 14% to 28% in the surface 10 cm of soil. Although ammonium-N under mulga is significantly different to that for 21-year-old buffel pasture at all depths, nitrification and net N mineralization are not different between the three land uses at any depth or in the entire 90 cm profile. The Soil Nitrogen Availability Predictor can be modified further to accurately predict net N mineralization for the mulga woodlands.
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ISSN:1442-9985