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American Chemical Society, ACS Earth and Space Chemistry , 4(2), p. 292-313, 2018

DOI: 10.1021/acsearthspacechem.7b00150

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Measuring plant-available Mg, Ca, and K pools in the soil-an isotopic dilution assay

Journal article published in 2018 by Geertje Van Der Heijden ORCID, Jérémie Bel, Carol-Ann Craig, Andrew J. Midwood, Louis Mareschal, Jacques Ranger, Etienne Dambrine, Arnaud Legout
This paper was not found in any repository; the policy of its publisher is unknown or unclear.
This paper was not found in any repository; the policy of its publisher is unknown or unclear.

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Abstract

In many forest ecosystems, plant-available pools of Mg, Ca, and K are assumed to be stored in the soil as exchangeable cations adsorbed on the cation exchange complex (exchangeable pools). However, between soil minerals and exchangeable cations exists a gradient of Mg, Ca, and K storage forms that have not been fully characterized and may play an important role in plant nutrition and biogeochemical cycles. We hypothesize that sources of Mg, Ca, and K in the soil other than the conventionally measured exchangeable pools are plant-available on very short time scales (