Sulfate-sulfur (Calcium phosphate extract)


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This is a soil fertility test. This method estimates the amount of sulfate sulfur in the soil by extraction with monocalcium phosphate. This method is only accurate for the time of sampling since sulfur is constantly being mineralized in the soil. The method has a detection limit of approximately 0.5 mg/kg sulfur as sulfate and is generally reproducible within 8%.


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