AgriZeroNZ invests in methane-reducing tech
A US-based company developing a vaccine to reduce methane emissions in cattle has received another capital injection from New Zealand’s agriculture sector.
Rob Hewett has been appointed the new chair of AgriZeroNZ, the public-private partnership designed to accelerate the development of tools to help Kiwi farmers reduce emissions.
The appointment follows the departure of Sir Brian Roche who steered the joint venture (JV) through its establishment phase.
Roche left the JV in November to take up the role of Public Service Commissioner.
Hewett is a sixth-generation farmer with a 1050ha sheep, beef, wind and forestry operation in South Otago, and holds multiple governance roles across agriculture, horticulture, exporting and energy sectors.
Currently, he chairs Silver Fern Farms, Farmlands, Woolworks, Hilton Haulage, Pioneer Energy, Fern Energy and Rewiring Aotearoa. He is also a director on T&G Global.
Hewett was endorsed for the AgriZeroNZ role by its investor partners (The a2 Milk Company, ANZ, ANZCO Foods, ASB, BNZ, Fonterra, Rabobank, Ravensdown, Silver Fern Farms, Synlait and MPI) and ratified by Cabinet given the Crown’s 50 per cent shareholding.
He says he is excited to join the JV and foster its focus on helping New Zealand farmers meet the global demand for emissions reduction.
“AgriZeroNZ is a fantastic example of how a group of disparate companies can come together with the government to solve a problem common for all New Zealand agriculture,” says Hewett.
“AgriZeroNZ’s work is not only fundamentally important for our collective future licence to operate among discerning global customers, it’s also personal for me as our family’s farming future will in large part be determined by the success of these activities,” he says.
AgriZeroNZ director, Fraser Whineray says the board and team are pleased to welcome Hewett.
“It’s important that AgriZeroNZ’s momentum and progress towards getting practical tools into the hands of New Zealand farmers at the earliest opportunity continues. Rob’s mix of extensive governance and hands-on farming experience makes him a great fit for this task.”
To date, AgriZeroNZ has committed over $46 million across a rapidly expanding portfolio of ventures, research projects and trials. This includes a methane-inhibiting bolus, vaccines, novel probiotics, feed additives and low-emissions pasture.
Waikato dairy farmer Neil Bateup, made a companion of the New Zealand Order of Merit (CNZM) in the New Year 2026 Honours list, says he’s grateful for the award.
Another Australian state has given the green light to virtual fencing, opening another market for Kiwi company Halter.
Farmer interest continues to grow as a Massey University research project to determine the benefits or otherwise of the self-shedding Wiltshire sheep is underway. The project is five years in and has two more years to go. It was done mainly in the light of low wool prices and the cost of shearing. Peter Burke recently went along to the annual field day held Massey's Riverside farm in the Wairarapa.
Applications are now open for the 2026 NZI Rural Women Business Awards, set to be held at Parliament on 23 July.
Ravensdown has announced a collaboration with Kiwi icon, Footrot Flats in an effort to bring humour, heart, and connection to the forefront of the farming sector.
Forest & Bird's Kiwi Conservation Club is inviting New Zealanders of all ages to embrace the outdoors with its Summer Adventure Challenges.

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