Mehlich 3 extractant for determination of available B, Cu, Fe, Mn, and Zn in cryic Alaskan soils

J. L. Walworth, R. G. Gavlak, M. T. Panciera

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Mehlich 3 extractable B, Cu, Fe, Mn and Zn, DTPA-TEA extractable Cu, Fe, Mn and Zn, and hot water extractable B were measured on three soils from factorial experiments with variable rates of B, Cu, Mn and Zn, and from two B rate and liming studies. Neither Mehlich 3 nor DTPA-TEA extractant predicted plant-available Cu or Fe. The inclusion of soil pH and organic matter slightly improved estimates of available B, Mn and Zn. Mehlich 3 extractable Fe was poorly related to DTPA-TEA extractable Fe. Copper extracted with Mehlich 3 was related to that extracted with DTPA-TEA; the inclusion of soil pH improved the relationship. Mehlich 3 extractable Mn and Zn were closely related to DTPA-TEA extractable levels. The correlation between Mehlich 3 and hot water B was significantly improved by including soil organic matter content. -from Authors

Original languageEnglish (US)
Pages (from-to)517-526
Number of pages10
JournalCanadian Journal of Soil Science
Volume72
Issue number4
DOIs
StatePublished - Jan 1 1992
Externally publishedYes

ASJC Scopus subject areas

  • Soil Science

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