




  • Claying involves adding and incorporating clay-rich subsoil into water repellent topsoil to overcome the repellence.

  • A small decrease in soil pH represents a large increase in soil acidity.

  • 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.

  • Convert to 100% neutralising value (NV) for equal comparison and discount to allow for differences in particle size and speed of reaction.

  • Soil acidity is a major constraint to farming in Western Australia.