Richard and Annabelle Subtil, Canterbury
The Subtils farm with passion and precision at Omarama Station in the foothills of the Southern Alps. They put their livestock and their environment first – two things valued highly by the companies they supply to. Knowing their greenhouse gas numbers is becoming an important part of that.
About the farm
Annabelle and Richard Subtil farm Omarama Station, a 12,000ha high country property in the Mackenzie Country. The property has been in Annabelle’s family since 1919 when it was purchased by her grandfather and great uncle.
One third of the farm is flat land and the rest hill country, ranging from 450m to 1,550m above sea level. The Subtils breed and finish merinos and beef cattle – currently carrying around 17,500 sheep and 350 cattle per annum. Around 40% of the farm’s income is from merino sheep meat, 30% from merino wool and 20% from the cattle. A homestay and hydro electricity generation provide additional income.

Merino sheep at Omarama Station. (Photo: Dave Allen Photography)
Average annual rainfall is low, at around 350mm on the flats and 500mm in the hills. Since 2008, 560ha of centre pivot irrigation has been developed, allowing an expansion of their operation into the fattening of bought-in store stock and the growing of speciality small seed crops for export.
Twenty-seven different soil types can be found across the property – a product of proximity to retreating glaciers. These soils are nutrient depleted and require careful management.
Environmental focus
Connecting with the consumers of their products has always been important to the Subtils, who started supplying wool to Icebreaker more than 20 years ago. Looking after their animals, their unique high-country environment and their staff is key for the couple, who know how highly these things are valued in the markets they supply to. In recent years, climate change and agricultural greenhouse gas emissions have become another important consideration.
The extremes of climate and elevation and the challenging soil conditions means care must be paid to the way the farm is managed.
In 2015/16, the Subtils began developing a farm environment plan to guide management and decision-making. Over time, this has become a comprehensive resource, now encompassing:
- A biodiversity audit
- Regular testing of water quality across nine sites as it enters and leaves the property
- Use of Ballance's MitAgator tool to create risk maps and identify mitigation strategies for nutrient loss
- Regular soil testing to ensure nutrient levels are optimal and fertiliser isn’t being used unnecessarily
- Irrigation monitoring
- Direct drilling/zero tillage
Having such a detailed farm plan and accompanying data helps them demonstrate their environmental performance to regulators and enables them to access a premium price from their brand partners.
“We’re selling two things,” says Richard. “We’re selling the raw materials – the wool and meat – but we’re also selling the story of those materials. And that story has to be accurate – the numbers have to stack up.”
A farm environment plan (FEP) is a tool for identifying and managing on-farm environmental risks. It is unique to a property and recognises the local climate and soils, the type of farming operation and the goals and aspirations of the farmer and their family. It is maintained over time as a living document – evolving as risks and opportunities arise.
Farm plans can be developed with the help of an advisor, or you can have a go with this helpful resource developed by Beef + Lamb New Zealand.
The Subtil's greenhouse gas numbers
As part of their thorough approach to environmental management, the Subtils have recently had an independent and detailed greenhouse gas assessment done by a specialist company. They also use OverseerFM to access a higher-level summary of their emissions.
The table below shows how this looked for Omarama Station in 2020:
2020 | |
Effective area (ha) | 11,936 |
Total methane (tonnes CO2-e) | 5,615 |
Total nitrous oxide (tonnes CO2-e) | 1,639 |
Total biological GHGs from effective area per hectare (tonnes CO2-e/ha) | 0.61 |
Total methane (kg)* | 224,612 |
N leaching (kg/N/ha/yr) | 4 |
*The weight of methane is shown here without conversion to carbon dioxide equivalence (CO2-e) because this is how it will be reported in any farm-level pricing mechanism.
These figures are fairly typical for a high-country farm, which an AgResearch study in 2020 found averages 0.7 tonnes CO2-e/ha per annum, with a range of 0.16-2.5 tonnes CO2-e/ha.
With their greenhouse gas numbers in hand and a comprehensive farm environment plan already in use, the Subtils are well-placed to address any regulatory requirements on climate change, as well as meeting the increasing demand from their brand partners for this information.
To find out more about the tools for estimating a farm’s greenhouse gas numbers, see our Know Your Numbers page.
On-farm actions
Planting trees to offset emissions is not an option on a farm like Omarama Station. In terms of achieving reductions in the future, they’re continuing their focus on:
- Making efficiency gains
- Fine-tuning stocking rate and improving individual animal performance
- Carefully managing nitrogen fertiliser use
For more on these actions and others, see our Current Actions page. They're also keeping an eye on the development of new technologies that farmers might be able to employ in the future.
“Every farm is different,” says Annabelle. “It’s always been our philosophy to do our own research, to get the numbers for our farm and to identify what particular actions might work in our unique part of New Zealand.”
Know your numbers and have a plan
By now, all farmers and growers must have a record of their annual on-farm greenhouse gas emissions (methane and nitrous oxide). By the end of 2024, they'll also need to have a written plan in place to manage them. These requirements are part of the He Waka Eke Noa partnership and are intended to help get farmers ready for agricultural greenhouse gas emissions to be priced from 2025. To find out more on how to do this, see our Know Your Numbers page.