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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
In this HydroTerra webinar, Phil Mulvey discusses the small water cycle and how maximising vegetative cover and soil organic matter through regenerative practices helps to mitigate drought and improve water use efficiency during bad seasons.
Watch on Youtube
Most degraded farms don’t need more inputs — they need a better starting point. This is how you actually begin rebuilding soil, water, and productivity.
Watch on Youtube
Most dry paddocks don’t just need more rain — they need to hold the rain they already get.In this paddock discussion, Phil and Stuart explain why damaged soil sheds water, loses resilience, and stops supporting healthy plant growth.
Watch on Youtube
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