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Are you stuck in the “lime every few years” cycle?
Soil scientist Phil Mulvey joins me in the vineyard to unpack how pH really works — from aluminium toxicity and CEC (cation exchange capacity) to buffering and why plant diversity can stabilise pH and rebuild soil structure. We compare lime vs a biological approach (multi-species covers, legumes, deep-rooters) and preview a follow-up on fungal inoculation.
What you’ll learn:
Why pH ≈ 6–6.5 maximises nutrient availability
The 5.2 pH aluminium toxicity cliff and shallow rootsHow CEC and organic matter “glues” create aggregation, infiltration & drought resilience
Practical seed-mix ideas for vineyards & grazing to buffer pH biologically
📍 Location: Australia (vineyard)🌱
Seed sources mentioned: Ardent Seeds (TAS) / ardentseeds mixes (mid-row & under-vine)
👤 Guest: Soil scientist Phil Mulvey
🚜 Tractor cameo: Ferguson TEA20
Check out Tim's website for even more content: https://timthompson.ag/
Subscribe for a new video each week! New content uploaded every weekend. Tim Thomspon's Youtube Channel: @farmlearningtim
Soil pH affects everything—from plant growth to stock health. But many farmers don’t realise how dramatic the impacts are… or how to test for it properly. In this episode, we dive into the fundamentals of soil pH, how it works, and how to measure it right on your farm.
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Across Australia the water cycle is broken. Extreme events, hot days, floods, droughts have increased. The pattern and nature of rainfall has changed. Particularly of the winter rain. What has caused this change?
Watch on Youtube
Phil Joins Luke Peel & Richard Campbell in a Q&A discussion about improving the security of water and food production whilst providing significant improvements in environmental outcomes.
Watch on Youtube
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