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Soil phosphorus testing: Colwell P and DGT-P – WA (Webpage)

This Soil Quality Knowledge Base webpage explains the 4 phosphorus pools: solution phosphorus, sorbed phosphorus, mineral phosphorus and organic phosphorus. A phosphorus soil test needs to test the all the types of phosphorus that are available to crops. It describes the Colwell P soil phosphorus test and the DGT-P soil phosphorus test. This information was previously published as an ebook, Soil Quality: 10 Plant nutrition. While the content is written for Western Australian soils, it may also apply to other Australian regions. #

  • Audience: RSP, tertiary students, landholders, SFSG, consultants
  • State: WA, SA, VIC, NSW
  • Author/Editor: SoilsWest
  • Publisher: Soil Quality Knowledge Base
  • Resource Type: Webpage
  • Copyright Year: 2023
  • Not Provided
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Resource Last Updated: May 14, 2025

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