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. 2016 Jun 14;11(6):e0156835. doi: 10.1371/journal.pone.0156835

Fig 4. Effects of OA supplementation on pH (I) and NH3-N concentration (II) of fermentation liquor in vitro.

Fig 4

All values are mean ± SEM. a, b, c Means that are sharing different superscripts are different (P < 0.05) within the same incubation stage.