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Agricultural lime is any product that is used to increase the pH of soil. In Western Australia, the three main sources are limesand, limestone and dolomitic lime.
Carbonate from calcium carbonate (or magnesium carbonate) neutralises acid in the soil.
Soil acidification occurs naturally very slowly as soil is weathered, but this process is accelerated by productive agriculture.
Aluminium toxicity in the subsurface is the major problem associated with soil acidity in Western Australia.
A small decrease in soil pH represents a large increase in soil acidity.
Convert to 100% neutralising value (NV) for equal comparison and discount to allow for differences in particle size and speed of reaction.