Dr David Barron has spent a lifetime at the forefront of agricultural science, from early herbicide trials in the jungles of Sabah to leading Western Australia’s research into weed management, chemistry, and crop tolerance. In this episode, Bill dives deep with David into the real science behind herbicides, the myths that refuse to die, and the innovations that transformed broadacre farming.

David shares candid stories from his decades in the field, including the rise of selective herbicides, the origins of IMI-tolerant crops, the controversy around glyphosate, and why understanding natural resistance is critical for the future. He also unpacks emerging risks in global agriculture, from biosecurity threats to the coming wave of autonomous and drone-driven farming systems.

This conversation offers rare clarity and grounded scientific insight into one of the most misunderstood areas of modern agriculture.

In this episode:

• How selective chemistry reshaped Australian farming • The truth about glyphosate, DDT, and toxicity • The creation of IMI-tolerant wheats and why it mattered

A must-listen for growers, agronomists, researchers, and anyone who wants to understand the real science driving Australian agriculture.

Dr Bill Bowden has spent more than five decades shaping the way Western Australia understands soil, fertiliser strategy and plant nutrition. In this episode, he joins host Bill Crabtree for a candid conversation about the science, history and hard-won lessons behind modern cropping systems.

From the early days of superphosphate to the complexities of trace elements, root development, pH buffering and nutrient availability, Bill breaks down how WA’s most infertile soils became productive and what farmers must keep in mind as systems evolve.

Together they unpack: • The rise of phosphorus use and the foundations of soil testing in WA • Copper, zinc, manganese and why positional availability still matters • Root biology and the shift from input-focused thinking to system understanding • No-till, deep ripping and the long-running debate around disturbance • Rock phosphate, calcination and the realities of using alternative P sources • The biological engine driving soils from microbes to termites

A must-listen for growers, agronomists, researchers and anyone working to improve soil fertility and system resilience across Australian agriculture.

Dr. Steve Carr joins Bill "No-Till Bill" Crabtree for a deep dive into soil acidity, the silent crop killer affecting thousands of Western Australian farms. With decades of research experience from UWA and hands-on fieldwork in the Eastern Wheatbelt, Dr. Carr breaks down the complex science behind why WA's ancient soils are naturally acidic and how modern agriculture accelerates the problem.

Dr. Carr's expertise transforms complex soil chemistry into actionable knowledge that can save your crops and boost profitability. Whether you're battling stubborn acid patches or planning long-term soil health strategies, this episode delivers the scientific insights you need.