Soil mass and grind size used for sample homogenization strongly affect permanganate-oxidizable carbon (POXC) values, with implications for its use as a national soil health indicator

M.M. Pulleman, Skye Wills, Rachel Creamer, Richard Dick, Rich Ferguson, Diane Hooper, Candiss Williams, Andrew J. Margenot

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Highlights
• We quantified methodological effects on POXC values for a diverse set of soils across the USA.
• No single soil mass × grind size combination provided POXC results within the method’s quantitation limits for all soils studied.
• Soil mass and mesh size had a marked effect on POXC values.
• The POXC method falls short as an analytical method for measuring a well-defined C pool.
• Implications for the use of POXC as a national soil health monitoring are discussed.
Original languageEnglish
Article number114742
JournalGeoderma
Volume383
DOIs
Publication statusPublished - 2021

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