It’s Official: Agriculture Can Make Major Emissions Reductions
Sustaianbaility Council Media Statement – 22 November 2007
An expert report commissioned by MAF has confirmed what agricultural leaders have been at pains to avoid acknowledging.
The agriculture sector can nearly halve its growth in greenhouse gas emissions since 1990 simply by applying
nitrification inhibitors to dairy pasture.
Prepared by Landcare Research, the report estimates this would reduce the emissions New Zealand must otherwise pay for
under the Kyoto Protocol by about $400 million at the current market price for quality carbon credits of $30/tonne. And
the Sustainability Council has previously reported that farmers can apply these inhibitors to dairy pasture at a profit.
Yet the taxpayer is currently picking up the tab for all agricultural excess emissions – a liability of about $1.5
billion at $30 a tonne. This is a result of Government plans to exempt agriculture from all responsibility for its
livestock emissions until 2013.
In other words, taxpayers are being told they need to fork out a $1.5 billion subsidy when it is now confirmed that
farmers can cut emissions worth at least $400 million using just one of a number of cost-effective techniques available.
It is galling that farming leaders continue to maintain that: “the only way to reduce emissions is to reduce
production”.
Nitrification inhibitors significantly reduce nitrous oxide emissions at a profit because the product displaces more
expensive urea fertiliser otherwise used to fix nitrogen. Nitrous oxides account for a third of agricultural emissions
and are equivalent to twice the greenhouse gas emissions of all New Zealand’s power stations.
The Landcare findings paint a similar picture to the Sustainability Council’s report, A Convenient Untruth, which in
June pointed out the national significance of major reductions in nitrous oxide emissions that can be achieved
cost-effectively.
Landcare assumes a 67% average rate of effectiveness for nitrification inhibitors whereas the Sustainability Council
assumed 70%, and Landcare assumes lower total emissions under business as usual than the MAF projections the
Sustainability Council relied on. However, both modelling approaches concur that the use of inhibitors on all dairy
pasture would roughly halve the growth in total agricultural emissions since 1990 – up 5.2 Mt in 2005 from the Kyoto
base year of 1990.
Landcare also confirms that this tool has the technical potential to eliminate the growth in all agricultural emissions
above 1990 levels. This would involve applying it to all sheep and beef pasture as well as dairy land – an approach that
has yet to be reported on for its cost-effectiveness.
ENDS