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. 2018 Dec 31;124(6):917–932. doi: 10.1093/aob/mcy221

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© The Author(s) 2018. Published by Oxford University Press on behalf of the Annals of Botany Company.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 4. — Plant height and visual root depth development. Plant height was measured starting 15 d after planting. The bars show the 95 % confidence interval.