Soil acidity, accelerated by modern farming practices like inefficient nitrogen use and crop removal, is a major problem in Australia. The logarithmic pH scale means small changes have big impacts. Roughly 50% of Australia's agricultural land is acidic, which reduces the availability of essential nutrients like phosphorus and nitrogen and releases toxic elements like aluminum and manganese, damaging plant roots and reducing crop yields.
Acidity also inhibits beneficial microorganisms such as rhizobia bacteria, crucial for nitrogen fixation, and can degrade the soil's physical structure, leading to erosion. The most common remedy is applying lime, which raises the pH and neutralizes acidity. While deep placement is being explored, prevention through regular soil testing and proactive, smaller applications of lime is more efficient and cost-effective for ensuring the long-term sustainability and health of agricultural land.
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