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. 2015 Sep 23;6:752. doi: 10.3389/fpls.2015.00752

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Copyright © 2015 López-Rayo, Nadal and Lucena.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Manganese, Zn, and Fe remaining in solution and Cu recovered from soil after 3 and 7 days in formulations containing Mn and Zn complexed by the ligands indicated in the legend, and Fe as o,o-EDDHA/Fe³⁺ (left), EDDHA_m–Fe (middle), or without Fe (–Fe) (right) added to a calcareous soil.