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. 2020 Feb 21;20:38. doi: 10.1186/s12866-020-1708-z

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© The Author(s). 2020

Open AccessThis 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. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 3 — Promotion of PGPRs combination on a nirogen, b phosphorus, and c potassium uptake for wheat. Values are means ± SE. abcde letters on the bars denote differences on the basis of a t-test (p < 0.05)