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. 2018 Oct 3;8:14743. doi: 10.1038/s41598-018-33040-7

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© The Author(s) 2018

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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Yield (a,b) and number of fruits per plant (c,d) in 2014 and 2015, respectively, for different irrigation water salinity and biochar treatments. For each year, different uppercase and lowercase letters indicate a significant difference among different biochar application rates (for a given irrigation regime) and salinity levels, respectively, at P < 0.05. B₁, B₂, B₃ and B₄ represent mixtures of soil with 0%, 2%, 4% and 8% of biochar by mass. I₀, I₁ and I₂ represent irrigation water salinity of tap water, 1 and 3 dS m⁻¹.