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. 2019 Jan 24;9:639. doi: 10.1038/s41598-018-36777-3

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© The Author(s) 2019

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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The effects of drought and fertilization on nematode response variables based on mixed effects model fits for each treatment. (a) Total nematode density per g dry weight soil; (b) nematode taxon richness; percentage of (c) bacteria-feeding nematodes; (d) plant-feeding nematodes; (e) fungal-feeding nematodes; and (f) predatory- and omnivorous nematodes. Error bars indicate 95% confidence intervals. Grey = no NPK fertilization; green = NPK fertilization. Both seasons (spring and summer 2017) are included (see Fig. S7 for seasonal effects). n.s. = not significant; ^(*)p < 0.1; *p < 0.05.