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. 2019 Apr 9;9:5810. doi: 10.1038/s41598-019-42118-9

Figure 5.

Figure 5

Principal component analyses of high-quality features detected in soil water extracts analyzed by (a) HILIC (+) and (b) HILIC (−) demonstrating the sensitivity of the untargeted technique to detect subtle variations in LMW DOM across space in these organic-rich soils.