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Phosphorus Index Test Form

Rao S. Mylavarapu, William d'Angelo, and Nancy Wilkinson

This document is the Phosphorus Index Test Form used by the UF/IFAS Extension Analytical Services Laboratories. The sheet provides details about collecting samples and testing fees. Download the form by clicking the orange download button.

The Phosphorus Index Test Form must accompany soil samples submitted to the UF/IFAS Extension Soil Testing Laboratory. This form allows for the following tests:

  1. Phosphorus Capacity Index Test (Mehlich-3 extraction method) [pH, P, Al, Fe (capacity index of soil)]

Also Available in: Español

Publication #SL394

Release Date:February 8, 2024

Related Experts

Mylavarapu, Rao S.


University of Florida

Wilkinson, Nancy


University of Florida

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Fact Sheet

About this Publication

This document is SL394, one of a series of the Department of Soil, Water, and Ecosystem Sciences, UF/IFAS Extension. Original publication date November 2013. Revised August 2019 and January 2024. Visit the EDIS website at for the currently supported version of this publication.

About the Authors

Rao S. Mylavarapu, professor, Department of Soil, Water, and Ecosystem Sciences; William d'Angelo, lab manager, UF/IFAS Extension Soil Testing Lab; and Nancy Wilkinson, assistant manager, UF/IFAS Extension Soil Testing Lab; UF/IFAS Extension, Gainesville, FL 32611.


  • Nancy Wilkinson
  • Rao Mylavarapu
thumbnail for publication: Phosphorus Index Test Form