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. 2018 Jan 10;8:295. doi: 10.1038/s41598-017-18632-z

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Spinach growth promotion in greenhouse experiments. Number of leaves (A) and size (B), fresh (C) and dry (D) weight and nitrogen (E) and chlorophyll (F) contents. Bars indicate the standard error. Histogram bars marked with the same letter in each treatment are not significantly different from each other at P = 0.05 according to Fisher’s Protected LSD (Least Significant Differences). Baby spinach (G, bar 270 mm) and adult spinach (H, bar 270 mm) from microcosm experiment.