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  • Science Backs Use Of Stubble Burning

Science backs use of stubble burning

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Stubble burn websiteA new FAR report commissioned by Environment Canterbury says stubble burning is an important tool for getting rid of crop residue on arable farms, but that more could be done to minimise smoke nuisance.

The report, entitled aReview of the role and practices of stubble burning in New Zealand, including alternative options and possible improvementswas prepared by FAR for Environment Canterbury. The regional council is reviewing the Air Chapter of its Natural Resources Regional Plan and is investigating current approaches to stubble burning as part of that review.

Katherine Trought of Environment Canterbury says the FAR report was comprehensive and provided insight into the agronomic effects of stubble burning, the strengths and weaknesses of alternatives, and provided an action plan for improving good management practice when stubble burning. The next step in the Air Chapter review would be a science investigation into the impact of stubble burning on air quality.

Codes of practice for stubble burning exist and FAR will now work with Federated Farmers to share the report’s findings with growers and promote good stubble burning practices.

Nick Poole, FAR’s Director of Research and Extensions, says pooling resources with the regional council enabled FAR to assemble an expert panel with international science input in order to review this important cropping issue.

"Gathering together a wider scientific panel for the review has ensured that any findings have been set in the context of international experience.”

Mr Poole says the report found that stubble burning has a key role to play in New Zealand’s cropping industry as a rotational management tool for establishment of small seeded export crops, such as grass seed and vegetable seed.

“Some crops cannot be grown in paddocks containing large amounts of residue, especially cereal residue. The report covers a lot of research on the pros and cons of stubble burning and its alternatives, and finds that burning not only enables timely and successful establishment of high value, small seeded crops, but that those crops can be established with minimal cultivation in a more weed, pest and disease-free environment. The resarch also showed that burning lowers the cost of production by reducing agrichemical usage, machinery costs and the amount of cultivation needed.”

Of the total national production of cereals in 2012, 87 percent of wheat, 66 percent of barley and 51 percent of oats were grown in Canterbury, meaning stubble burning is more commonly used in this region than anywhere else in New Zealand, he says.

“We believe that it is beholden on all cropping farmers using this important cultural management tool to not only adhere to the current regulations and code of practice, but to go that extra mile in order to prevent the effects of smoke nuisance in residential areas.”

A full copy of the review can be read here.

Key facts about stubble burning

FAR Communication and Action Plan

Further information on Environment Canterbury’s review of the Air Chapter of its Natural Resources Regional Plan can be found here.

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