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Science

EcoFarm Aotearoa

by Ewan Campbell with co-host Stephen Brunton
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Latest episodes

  • Your Soil Could Be Worth MILLIONS

    October 7, 2026 · 27 min

    What if the biggest financial asset on your farm is already sitting in the soil? In this episode, Scott Gordon joins the conversation to break down the financial side of soil fertility, looking at the value of minerals locked up in the…

  • What Your Herbage Test Is Really Telling You

    September 29, 2026 · 42 min

    Herbage testing can reveal a lot about what is happening in your soil, but timing and the right combination of tests are crucial. In this episode, Ewan and the team look at why mid to late spring can be such an important window for herbage…

  • Cultivation and Cropping: The Mistake That Costs Farmers Thousands

    September 16, 2026 · 50 min

    Winter cropping can be expensive, risky and essential for getting livestock through the colder months. But what if the way we prepare a cropping paddock is actually setting it up to fail? In this episode, Ewan and the team dig into the…

  • More Farming Questions Answered: Nitrogen, Fungi & More

    August 21, 2026 · 14 min

    The questions keep coming! In Part 2 of our farming Q&A, we continue answering your comments, challenging conventional thinking and digging deeper into some of the biggest conversations around modern agriculture. In this episode: In this…

  • Your Farming Questions Answered: Soil, Carbon, Glyphosate & More

    August 13, 2026 · 47 min

    What are farmers actually asking about soil, carbon, regenerative farming and the future of agriculture? In this episode of EcoFarm Aotearoa, Ewan Campbell sits down to work through questions and comments from our viewers, covering…

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  • The Nitrate Debate: Here's What People Got Wrong

    August 6, 2026 · 35 min

    A short clip from a previous episode sparked plenty of debate online, so Ewan Campbell is taking the opportunity to dive deeper into one of agriculture's most misunderstood topics: nitrates. In this episode:In this episode of EcoFarm…

  • Inside China's Massive Organic Farming Operation

    July 29, 2026 · 1 hr 24 min

    China is changing the way it farms, and the scale of what they're achieving is staggering. In this episode: After returning from an agricultural study trip to China, Gavin Fisher shares what surprised him most: climate-controlled dairy…

  • News Outlets Throwing Blame To Farmers!

    July 17, 2026 · 42 min

    A new New Zealand study has linked nitrate levels in drinking water to premature births, but does that tell the whole story? In this episode of EcoFarm Aotearoa, we unpack the latest media reports surrounding nitrates and explore what…

  • We Sent Steve To A Coal Mine! Reefton Episode Part 2

    July 1, 2026 · 17 min

    In this episode, Stephen heads to the West Coast for an exclusive behind-the-scenes tour of the Reefton coal mine to see firsthand how mining by-products are transformed into valuable inputs for regenerative farming. Joined by the mine…

  • Can Mining Improve Agriculture?

    June 26, 2026 · 46 min

    In this episode, Stephen and Ewan are joined by Jimmy, a lifelong West Coast coal mining expert, to explore the surprising connections between geology, mining, soil health, and modern agriculture. What begins as a conversation about coal…

  • The Farming Discovery That Turned Conventional Agriculture Upside Down

    June 21, 2026 · 48 min

    In this episode, Stephen and Ewan are joined by Robin Claire, host of Cultivated Audio, for a fascinating conversation exploring soil health, regenerative agriculture, and the hidden forces shaping the future of farming. What begins as a…

  • The $3 Billion Fertiliser Plant Nobody Needed

    June 21, 2026 · 44 min

    In this episode, Stephen and Ewan unpack the controversy surrounding a proposed $3 billion lignite-to-fertiliser plant in Southland, New Zealand, and ask a bigger question: why are we investing billions into synthetic nitrogen production…

Full episode archive on Apple Podcasts →

About the show

From paddock to podcast, EcoFarm Aotearoa showcases Ewan Campbell, a respected name in NZ farming, known for turning good science into better practice. With co-host Stephen Brunton, Ewan unpacks his audiobook and the big issues: nitrate and water quality, soil biology, mineral balance, genetics, pasture growth, animal health, and profitability. Real stories, clear takeaways—ready for the ute, cowshed, or tractor. Notes & links: efa.nz