The couple breed grass-fed wagyu under the banner The Tasmanian Agricultural Company, and became the first farm in Tasmania to register a soil carbon project under the Australian Government's $2.5 billion Emissions Reduction Fund.

They have adopted a range of regenerative farming practices to build soil carbon and increase soil health, with any increase in carbon to be purchased by the federal government as carbon credits, which will then count towards Australia's emissions reduction target under the United Nations Paris agreement

Mr Trethewey said a full initial baseline analysis of the soil in multiple locations on their farm was undertaken last year.

"They measure where your soil carbon is at right now, we then implement a number of management practices, usually over two to three years, and then they will remeasure and get a new baseline," he said.

"Hopefully there should be an increase and that difference can be quantified in tonnes of carbon that you have put into your soil. We get production increases and benefits on farm, but also get paid by the federal government who buy those carbon credits"

Mr Trethewey said a major regenerative method was to plant multi-species pastures and crops, where up to 20 different species are planted to mimic a more natural eco-system and put carbon back into the soil. He said they were working with AgriProve, which believes Tasmania is ideally positioned for soil carbon.

"We are doing this because it is the right thing to do. We believe building soil carbon and increasing soil health is the right way to farm, and hope that more Tasmanian farms can take inspiration from what we are doing," he said. "Just on our farm alone, if we have a good season, we could offset half the emissions of Manly in Sydney."