Synthetic nitrogen fertiliser cap

 Submitting a synthetic nitrogen use report

To submit a synthetic nitrogen use report, you can use the Ballance or Ravensdown tools, or the national tool, which we will link here when available.

Due to delays outside of our control, this tool will not be available until a later date. You do not need to report until this tool is available. If you wish to be notified when the tool is available, email and we will add you to our mailing list.


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The use of synthetic nitrogen fertilisers on land is linked to lowered water quality in some of our rivers, streams, and groundwater. On 1 July 2021, the Government introduced a cap on the application of synthetic nitrogen fertiliser for land grazed by livestock under the new Essential Freshwater package.

On grazed pasture, you can no longer apply more than 190 kg of synthetic nitrogen per hectare per year (190kg N/ha/year) without resource consent. This limit applies both as an average for the farm*, and to each hectare (with a limited exception for land used to grow annual forage crops).

Dairy farmers must also record synthetic nitrogen fertiliser use and report it back to us each year.

*Farm in this case refers to a contiguous landholding – that is, each adjoining or touching land parcel is considered part of the same farm, while land parcels that don’t border others are considered separate farms.

tractor spreading fertiliser

Which farms does the cap apply to?

The cap on synthetic nitrogen fertiliser use only applies to pastoral land – that is, land on which livestock is grazed. This does not include the grazing of the stubble of a crop that has been harvested after arable land use. 

On land with mixed use, the 190kg N/ha/year limit applies when the land is being used for the grazing of livestock, from crop or pasture preparation until grazing finishes.

Reporting on synthetic nitrogen use 

Dairy farmers are now required to report their annual synthetic nitrogen fertiliser use to us. The first report, covering the period from 1 July 2021-30 June 2022 will need to be submitted when the reporting tool is available. If you wish to be notified when the tool is available, email and we will add you to our mailing list.

How to submit your synthetic nitrogen use report 

The major fertiliser suppliers Ballance and Ravensdown are developing tools you can use to record and report your synthetic fertiliser use, through the MyBallance and HawkEye programmes, respectively. 

If you are a Ballance or Ravensdown customer, you should have received information from them explaining how to use MyBallance and Hawkeye to record synthetic nitrogen fertiliser usage. If you are using the MyBallance or HawkEye tools, prior to submitting your data you will need to confirm that you agree to any agreements or policies required to submit data through these tools.

If you are not currently a customer, you may still be able to use these tools. Visit the Ballance website or contact Hawkeye customer support on 0800 73 73 73 to find out how.

Alternatively, you can report this information through the national reporting tool being developed by the regional councils of New Zealand. When available, we will publish the tool on this webpage. Unfortunately, this tool has been delayed. While the tool is unavailable, we won't be requiring you to meet the 31 July submission date.

However, it's important you measure your synthetic nitrogen use to ensure it is below 190kg N/ha/year - and if it’s not, make changes to reduce it.

Please use our calculator to determine your synthetic nitrogen use, and if required, review your farming practices to reduce your use.


What information you'll need to report

Contact information:

  • Full name
  • Contact phone number
  • Email address

Farm information:

  • New Zealand Business Number (NZBN)
  • Farm name 
  • Dairy supply number
  • Dairy company name
  • Total farm area (in hectares)
  • Total effective area (area farmed, in hectares)  
  • Geospatial boundary (Add a geospatial shape file of boundary. Depending on how your data is submitted you may be able to select the geospatial area on a map.)
  • Receipts for fertiliser purchases:
    - supplier's name
    - date of purchase
    - item description
    - item unit purchased (kg)
  • Dairy effluent consent number (you can find this using our consent search tool)

Information for each contiguous land holding:

  • Name / label (give a name or number for each land parcel)
  • Total area in hectares (If you have only one contiguous land holding, this will be the same as total farm area; if you have more than one contiguous land holding, the sum of total areas should be the same as the total farm area.)
  • Geospatial boundary
  • Grazed land area (in hectares)
  • Grazed forage crop area (in hectares)
  • Grazed non-forage land area (in hectares)
  • Ungrazed land area (in hectares)

Synthetic nitrogen cap calculation:

  • Reporting year (e.g. 2022)

The following four can be calculated using the Ballance or HawkEye tools, or our Excel calculator (XLSX file, 102.5).

  • Grazed land nitrogen application rate 
  • Grazed forage crop application rate
  • Grazed non-forage crop application rate
  • Ungrazed land application rate
  • Confirmation that less than 190kg of synthetic nitrogen fertiliser per hectare has been applied to grazed pasture 

Fertiliser application:

  • Fertiliser name and manufacturar
  • Day of application
  • Percentage of nitrogen in fertiliser

More information

In October 2021, the Ministry for the Environment published several nitrogen cap guidance documents, covering the different types of farming operations. You can also contact your fertiliser supplier for more advice on measuring and meeting the nitrogen cap.

Applying for a time extension to meet the nitrogen cap

If you need more time to reduce your synthetic nitrogen applications below the nitrogen cap, you can apply for a short duration consent to cover the transition period.

You will need to be operating at or below the nitrogen cap by 1 July 2023.

Alternatively, consent can be sought for a longer duration (a maximum of 5 years), but a more comprehensive resource consent application will be required. 

Applying for resource consent to exceed the nitrogen cap

If you cannot meet the 190kg N/ha/year cap (at both property and hectare level), you will need to apply for a resource consent

If you have a resource consent for the use of land for farming, you will still need to comply with rules in the National Environmental Standards for Freshwater that restrict applications of synthetic nitrogen fertiliser on to pastoral farms.

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