Assessing soil nitrogen supply in wheat monoculture under no-tillage in Western Australia

Nathan Craig

    Research output: ThesisDoctoral Thesis

    6 Downloads (Pure)

    Abstract

    Nitrogen availability for crop production may be reduced under current farming methods in Western Australia. This study investigated soil mineral nitrogen and crop residue dynamics in relation to grain yield for two contrasting crop rotations under no-tillage. Growing wheat in rotation with legume and canola increased grain yield only in growing seasons of above average rainfall. Monoculture wheat with nitrogen fertiliser had similar yields to wheat in rotation with no nitrogen applied in most years, but caused a reduction in the mineralisation of soil nitrogen. Crop residue was found to play an important role in recycling nitrogen under no tillage.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Awarding Institution
    • The University of Western Australia
    Award date4 Jul 2017
    DOIs
    Publication statusUnpublished - 2017

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    Western Australia
    no-tillage
    wheat
    nitrogen
    soil
    crop residues
    grain yield
    canola
    recycling
    crop production
    mineralization
    nitrogen fertilizers
    legumes
    farming systems
    growing season
    rain
    methodology

    Cite this

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    Assessing soil nitrogen supply in wheat monoculture under no-tillage in Western Australia. / Craig, Nathan.

    2017.

    Research output: ThesisDoctoral Thesis

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    N2 - Nitrogen availability for crop production may be reduced under current farming methods in Western Australia. This study investigated soil mineral nitrogen and crop residue dynamics in relation to grain yield for two contrasting crop rotations under no-tillage. Growing wheat in rotation with legume and canola increased grain yield only in growing seasons of above average rainfall. Monoculture wheat with nitrogen fertiliser had similar yields to wheat in rotation with no nitrogen applied in most years, but caused a reduction in the mineralisation of soil nitrogen. Crop residue was found to play an important role in recycling nitrogen under no tillage.

    AB - Nitrogen availability for crop production may be reduced under current farming methods in Western Australia. This study investigated soil mineral nitrogen and crop residue dynamics in relation to grain yield for two contrasting crop rotations under no-tillage. Growing wheat in rotation with legume and canola increased grain yield only in growing seasons of above average rainfall. Monoculture wheat with nitrogen fertiliser had similar yields to wheat in rotation with no nitrogen applied in most years, but caused a reduction in the mineralisation of soil nitrogen. Crop residue was found to play an important role in recycling nitrogen under no tillage.

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