Soils For Life

Dr Mary Retallack is an agricultural scientist, third-generation viticulturist and agroecologist who has spent more than three decades advancing environmental stewardship within agricultural landscapes. She grew up on a fruit block in SA's Riverland growing grapes, apricots and pears, and now lives on a small vineyard and apple orchard surrounded by native insectary plants in the Adelaide Hills.
Mary is the founder and custodian of the award-winning National EcoVineyards Program, working in collaboration with more than 175 program partners and wine growers across fifteen regions in four states to build functional biodiversity, restore soil health, and reduce reliance on synthetic inputs.
Mary’s PhD research in viticulture and plant protection focused on native insectary ground cover plants and the role they play in supporting natural predators of vineyard pests. Her findings show how functional diversity not only builds ecological health, but delivers economic benefits to growers, and there are heaps of detailed case studies from growers around the country on the EcoVineyards website.
If you’re involved in perennial horticulture, check out our new Orchard Resilience Project. With funding from the Australian Government’s Climate-smart Agriculture Program, we’re working over the next three years with perennial horticulture growers across Australia to strengthen soil health and landscape function in tree and vine crops.
Links and resources:
EcoVineyards Program
Retallack Ecology
Soils for Life Orchard Resilience Project
John Kempf’s Plant Health Pyramid
If you have feedback, questions, or suggestions for future episodes or guests, we'd love to hear from you - reach out on social media or at [email protected].

Matthew Evans is a chef, farmer, author, food advocate and founder of Australia's Grounded Festival (coming up in April - tickets available at groundedaustralia.com.au).
Soils for Life is kicking off a new national program working with dairy farmers around the country (join our launch event in March, details via https://events.humanitix.com/dairy-profitability-and-resilience-through-diversity-and-soil-health), and we thought it was the perfect time to talk to Matthew about his most recent book, ‘Milk: The truth, the lies and the unbelievable story of the original superfood’.
We discuss some of the debates around dairy, including lactose intolerance, nutrition, and sustainability and how regenerative practices on farms can improve both soil and milk quality.
You’ll hear about:
The biology of milk, and how evolution has designed milk to be the perfect food source for nourishing and protecting the young

The history of humans drinking milk from other animals, and why it became so central to many cultures

Health benefits of milk, from complex proteins to compounds that support immunity and brain health

How plant diversity and soil health influence milk quality, including omega-3 / omega-6 ratios

Comparing dairy versus milk alternatives

Links and resources:
Grounded Festival 2026 described by Matthew

Matthew’s book 'Milk The truth, the lies and the unbelievable story of the original superfood'

The study on Regenerative farming enhances human health benefits of milk and yoghurt in New Zealand dairy systems, mentioned by Matthew

Find our more about the Soils for Life Dairy Resilience Project

Today, we’re bringing you something a little different. I’ve recently been involved in a new podcast series called 'Soil: Rewilding the Underground'. It does a fantastic job of telling the big picture story of soil, why it’s so important not just for farmers and food production, but also for water, for biodiversity, for climate stability, and for human health.
Today we’re giving you a sneak peek of the first episode, and we encourage you to check out the full six part series wherever you get your podcasts. It features an amazing array of speakers, including farmers, soil scientists, biologists, geologists, First Nations land managers, journalists, chefs and more.
If you want to listen to the rest of this episode, and the full six part series, search for Soil: Rewilding the Underground wherever you get your podcasts or head to www.thesoilpodcast.com/podcast.
We will be back soon with our next regular episode of the Soils for Life podcast. Thanks for listening!

Outro

Dr Susan Orgill is Chief Scientist at Impact Ag Australia and a leading soil scientist with more than 20 years’ experience. She specialises in soil health, carbon farming, and regenerative agriculture, delivering science-based strategies that improve farm resilience, natural capital, and climate outcomes across research, policy, and sustainability initiatives.
Suz has long been a friend of Soils for Life. She’s one of the most interesting and impressive soil scientists working in agriculture, and we’ve been meaning to get her on the podcast for some time. So please enjoy this conversation with the one and only Suz Orgill.
Mentioned in this episode:
Paper mentioned by Dr Susan Orgill: "Placing cropping systems under suboptimal phosphorus conditions promotes plant nutrient acquisition and microbial carbon supply without compromising biomass"
Frank Ashwood photography from Soils for Life case study farms
Aviva Reed visual ecologist - avivareed.com

Western Australian farmer Brad Campbell has spent years refining his mixed cropping system to build healthier, more resilient plants and reduce reliance on synthetic inputs. Over time, he’s cut out routine fungicides and insecticides, moved away from chemical seed treatments, and now only uses pesticides strategically when needed.
In this conversation, Brad talks about how targeted plant nutrition, sap testing and careful observation are helping him make management decisions and improve crop health.
Brad shares how his family’s early shift toward biological farming set the foundation for his approach, why monitoring matters more than ever, and what he means when he says you have to earn the right to reduce pesticides.
Brad’s story features in our Practice Guide on Building Plant Resilience to Pests and Diseases, which brings together insights from farmers and experts across Australia. You’ll find it at soilsforlife.org.au
In this episode
Why Brad says you need to “earn the right” to reduce pesticides
How sap and tissue testing inform his nutrition decisions
Using observation and small-scale trials to guide change
What’s changed in soil function and disease pressure over time
Lessons from experimenting, learning and staying profitable
Resources
Practice Guide: Building plant resilience to pests and diseases https://soilsforlife.org.au/practice-guide-building-plant-resilience-to-pest-and-disease/
Explore more cropping practice guides and farmer stories at soilsforlife.org.au
Brad mentioned a course by Neil Kinsey: https://kinseyag.com/ 
Brad also mentioned a course by Arden Anderson: https://soillearningcenter.com/product/sustainable-agriculture-course/ 

This short episode of the Soils for Life Podcast was hosted by Eli Court and produced by Chris Wieffering.
If you enjoyed this episode, please rate and share it, and subscribe to hear more stories from Australian farmers building soil and landscape resilience.