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. 2016 Jul 8;411(1):139–150. doi: 10.1007/s11104-016-2961-7

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© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — Increases in wheat grain Zn concentration as a result of foliar- or soil-applied/granular Zn fertilisers compared to unfertilised controls. Boxes represent the middle two quartiles; whiskers represent the 95 % confidence limits; outliers circled. Median increases are indicated by the horizontal line and text within the box. Data are from a literature-survey of Joy et al. (2015b)