The neutralising value of a liming material is expressed in terms of the percentage of calcium oxide expressed in calcium carbonate equivalent. By taking a sample of soil and testing the neutralising value we can help determine the levels of liming material in your soils. The test is carried out using hydrochloric acid and sodium hydroxide until the whole solution is neutral and reads a pH of 7.0. The quantity of sodium hydroxide used correlates to a particular neutralising value on our provided data sheets.
PLEASE NOTE: The field test kits provide an approximate result. The accuracy of this field test is not guaranteed. For definitive accurate results please send your sample to Liquid Labs WA.’