[ASC-media] WA FARMERS SAY 'NO' TO N2O
brendon at iinet.net.au
Thu Apr 26 02:22:16 CEST 2007
WA FARMERS SAY 'NO' TO N2O: WA farms can have low nitrous oxide (N2O)
emissions, provided nitrogen fertiliser applications are well managed.
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A GRDC and Australian Greenhouse Office supported project at the Department
of Agriculture and Food WA measured annual N2O emissions from a grainbelt
soil at Cunderdin Agricultural College to determine the influence of WA
grain production on global greenhouse gas emissions.
University of Western Australia researcher, Dr Louise Barton said N2O is a
greenhouse gas and ozone depletor, with agricultural soils accounting for 70
to 81 per cent of the increase in global N2O emissions.
"Soil microbial activity is the main N2O source from agricultural soils and
the increase in global N2O emissions is linked to increased nitrogen
fertiliser use internationally," she said.
"However, if WA farmers ensure that the amount of fertiliser nitrogen
applied and its timing is well matched with crop requirements, then N2O
emissions should be low.
"The proportion of applied nitrogen fertiliser emitted as N2O after one year
was 0.02 per cent at Cunderdin, compared to an international average of 1.25
per cent," Dr Barton said.
Contact: Dr Louise Barton, Tel 08 6488 2543
Authorised by Grains Research & Development Corporation (GRDC) and issued
on its behalf by
Brendon Cant & Associates, Tel 08 9384 1122
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