Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/20021
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dc.contributor.authorBrock, Philippaen
dc.contributor.authorMuir, Sallyen
dc.contributor.authorHerridge, Daviden
dc.contributor.authorSimmons, Aaronen
dc.date.accessioned2017-02-17T10:56:00Z-
dc.date.issued2016-
dc.identifier.citationCrop and Pasture Science, 67(8), p. 812-822en
dc.identifier.issn1836-5795en
dc.identifier.issn1836-0947en
dc.identifier.urihttps://hdl.handle.net/1959.11/20021-
dc.description.abstractWe used life cycle assessment methodology to determine the cradle-to-farmgate GHG emissions for rainfed wheat grown in monoculture or in sequence with the break crops canola ('Brassica napus') and field peas ('Pisum sativum'), and for the break crops, in the south-eastern grains region of Australia. Total GHG emissions were 225 kg carbon dioxide equivalents (CO₂-e)/t grain for a 3 t/ha wheat crop following wheat, compared with 199 and 172kg CO₂-e/t for wheat following canola and field peas, respectively. On an area basis, calculated emissions were 676, 677 and 586kg CO₂-e/ha for wheat following wheat, canola and field peas, respectively. Highest emissions were associated with the production and transport of fertilisers (23-28% of total GHG emissions) and their use in the field (16-23% of total GHG emissions). Production, transport and use of lime accounted for an additional 19-21% of total GHG emissions. The lower emissions for wheat after break crops were associated with higher yields, improved use of fertiliser nitrogen (N) and reduced fertiliser N inputs in the case of wheat after field peas. Emissions of GHG for the production and harvesting of canola were calculated at 841kg CO₂-e/ha, equivalent to 420kg CO₂-e/t grain. Those of field peas were 530kg CO₂-e/ha, equivalent to 294kg CO₂-e/t grain. When the gross margin returns for the crops were considered together with their GHG emissions, the field pea-wheat sequence had the highest value per unit emissions, at AU$787/tCO₂-e, followed by wheat-wheat ($703/tCO₂-e) and canola-wheat ($696/tCO₂-e). Uncertainties associated with emissions factor values for fertiliser N, legume-fixed N and mineralised soil organic matter N are discussed, together with the potentially high C cost of legume N₂ fixation and the impact of relatively small changes in soil C during grain cropping either to offset all or most pre- and on-farm GHG emissions or to add to them.en
dc.languageenen
dc.publisherCSIRO Publishingen
dc.relation.ispartofCrop and Pasture Scienceen
dc.titleCradle-to-farmgate greenhouse gas emissions for 2-year wheat monoculture and break crop-wheat sequences in south-eastern Australiaen
dc.typeJournal Articleen
dc.identifier.doi10.1071/CP15260en
dc.subject.keywordsEnvironmental Impact Assessmenten
dc.subject.keywordsEnvironmental Monitoringen
local.contributor.firstnamePhilippaen
local.contributor.firstnameSallyen
local.contributor.firstnameDaviden
local.contributor.firstnameAaronen
local.subject.for2008050206 Environmental Monitoringen
local.subject.for2008050204 Environmental Impact Assessmenten
local.subject.seo2008960603 Environmental Lifecycle Assessmenten
local.subject.seo2008960604 Environmental Management Systemsen
local.profile.schoolSchool of Environmental and Rural Scienceen
local.profile.emaildherridg@une.edu.auen
local.output.categoryC1en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordune-20161107-114427en
local.publisher.placeAustraliaen
local.format.startpage812en
local.format.endpage822en
local.identifier.scopusid84983284958en
local.peerreviewedYesen
local.identifier.volume67en
local.identifier.issue8en
local.contributor.lastnameBrocken
local.contributor.lastnameMuiren
local.contributor.lastnameHerridgeen
local.contributor.lastnameSimmonsen
dc.identifier.staffune-id:dherridgen
local.profile.orcid0000-0002-0423-2517en
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.profile.roleauthoren
local.identifier.unepublicationidune:20219en
dc.identifier.academiclevelAcademicen
local.title.maintitleCradle-to-farmgate greenhouse gas emissions for 2-year wheat monoculture and break crop-wheat sequences in south-eastern Australiaen
local.output.categorydescriptionC1 Refereed Article in a Scholarly Journalen
local.search.authorBrock, Philippaen
local.search.authorMuir, Sallyen
local.search.authorHerridge, Daviden
local.search.authorSimmons, Aaronen
local.uneassociationUnknownen
local.year.published2016en
local.fileurl.closedpublishedhttps://rune.une.edu.au/web/retrieve/a33b64a3-9fde-46d3-be8b-61ad758ac407en
local.subject.for2020410402 Environmental assessment and monitoringen
local.subject.seo2020190204 Environmental lifecycle assessmenten
local.subject.seo2020189999 Other environmental management not elsewhere classifieden
Appears in Collections:Journal Article
School of Environmental and Rural Science
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