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Alternative pH testing method shows promise

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A study into the use of instantaneous pH probes inserted directly into moist soil to measure pH has found they are capable of making accurate measurements and are cheaper than traditionally used soil tests when many samples are required across a paddock... Soil pH is typically measured in WA by taking a soil sample and sending it to a laboratory where the soil is mixed in a solution of 1:5 CaCl2 and measured with a glass probe... But instantaneous pH probes provide the potential to relatively quickly and cheaply measure soil pH at many sites across a paddock, allowing pH and lime application maps to be drawn...
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