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Explore our growing library of podcasts and videos designed to bring soil science to life. Hear directly from farmers, researchers, and industry experts as they share real-world experiences, practical strategies, and the latest innovations in soil management.

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      The Resource Hub brings together practical, evidence-based information you can apply on-farm — from step-by-step guides and case studies to calculators and technical resources.

      Whether you’re tackling a specific soil constraint or looking to improve long-term productivity, you’ll find resources tailored to your needs.

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    • Q28. Why is the exchangeable sodium per cent on my soil test result so high?

      High ESP results often reflect interference from soluble sodium in saline soils; requesting a pre-wash test can provide a more accurate measure of exchangeable sodium.

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    • Q27. What’s the difference between sodic soil and dispersive soil?

      Sodic soils contain high sodium (ESP ≥6% in topsoil), while dispersive soils lose structure when wet; although related, not all sodic soils disperse and not all dispersive soils are sodic.

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    • Q26. What crop options are good for dispersive soils?

      Triticale and selected oat varieties perform best on dispersive soils, but suitable crop choices depend on associated issues like salinity, sodicity, and waterlogging.

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    • Q23. Why does adding gypsum help improve soil structure on clay soil?

      Gypsum improves dispersive clay soil structure by temporarily suppressing sodium-induced dispersion and replacing sodium ions with calcium over time.

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    • Q22. How do I tell if I have dispersive soil?

      Test soil dispersion by placing soil aggregates in distilled water – cloudy water indicates dispersive soil, while clear water with aggregate crumbling indicates slaking.

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    • Q18. Should I use lime or gypsum on my acidic soils?

      Use lime to effectively raise soil pH, as gypsum has minimal impact on acidity and is more suitable for dispersive soils or as a sulphur source.

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