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

Nathan Craig

doi:10.26182/5c60ea364bd05

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

Nathan Craig

Research output: Thesis › Doctoral Thesis

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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 language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Flower, Ken, Supervisor Ward, Philip, Supervisor Gupta, Vadakattu, Supervisor, External person Renton, Michael, Supervisor
Award date	4 Jul 2017
DOIs	https://doi.org/10.26182/5c60ea364bd05
Publication status	Unpublished - 2017

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10.26182/5c60ea364bd05

THESIS - DOCTOR OF PHILOSOPHY - CRAIG Nathan William - 2017
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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.

KW - mineral nitrogen

KW - no-tillage

KW - Western Australia

KW - wheat

U2 - 10.26182/5c60ea364bd05

DO - 10.26182/5c60ea364bd05

M3 - Doctoral Thesis

ER -

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

Abstract

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