SSSAJ -- He et al. 70 (5): 1741 Figure IG3

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Fig. 3. Solution ³¹P NMR spectra of humic substances. Spectra are plotted with 15 Hz line-broadening. WHa, Waskish peat reference humic acid; WFa, Waskish peat reference fulvic acid; EHa, Elliott soil standard humic acid; EFa, Elliott soil standard fulvic acid.