Q3. What’s the best way to test phosphorus in calcareous soils?

The DGT-P test is a better guide to soil phosphorus levels as Colwell P can overestimate soil available P in calcareous soils. The DGT method does not need the phosphorus buffering index (PBI) to help interpret the result.

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What’s the best way to test phosphorus in calcareous soils?

🧪 Not all phosphorus tests are created equal! Standard P tests like Colwell P often overestimate available phosphorus in calcareous soils. The DGT-P test provides a more accurate result without needing adjustments for the PBI.

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