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Comparison of Colorimetric and ICP Techniques for Phosphorus Determination in Mehlich-1 and -3 Soil Extracts

FAES Project Number: SWS-03865

Project Duration: Short

Goals and Objectives
Comparison of colorimetric and ICP Mehlich-1 and -3 extractable phosphorus concentrations indicate that the P concentraions tend to be overestimated by the ICP techniques. A regional study (southeast) has been initiated through the SERA-IEG-6 committee to investigate the reasons for accurate P determination and identify the appropriate techniques.