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Reducing greenhouse gas emissions from fertiliser in irrigated cotton

23 September 2015

This method provides for generating abatement by reducing emissions associated with synthetic nitrogen fertiliser use in irrigated cotton production.

The method is based on increasing the efficiency of nitrogen fertiliser use, measured as the ratio of cotton lint yield to nitrogen applied via synthetic fertiliser. An increase in nitrogen fertiliser use efficiency is equivalent to a decrease in emissions intensity from synthetic fertiliser use. Management actions taken under the method can maintain lint yield while reducing fertiliser use, or improve lint yield without a proportional increase in fertiliser use.

This method supports a broad range of management actions, including changes in the rate, timing, method and type of nitrogen fertiliser application. At least one new management action to improve nitrogen fertiliser use efficiency must be undertaken in the project area, and participants have the flexibility to select management actions that suit their individual circumstances.

The method applies only to cotton crops grown under irrigation, where the emissions of nitrous oxide can be directly related to the rate of fertiliser nitrogen used on the crop. The method only covers the use of synthetic fertiliser.

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