Fig. 3: Bulk C K-edge NEXAFS analysis showing differences in chemical composition of the silt and clay size fractions in the rhizosphere. | Communications Earth & Environment

Fig. 3: Bulk C K-edge NEXAFS analysis showing differences in chemical composition of the silt and clay size fractions in the rhizosphere.

From: Root exudates simultaneously form and disrupt soil organo-mineral associations

Fig. 3

C K-edge NEXAFS spectra of the whole soil, silt fraction, and clay fraction collected from a rhizosphere and b non-rhizosphere soil in microcosms grown with maize under dry and moist moisture treatments. Graphs show normalized modeled spectra following deconvolution of raw spectra. Spectral features identified by the vertical dashed lines correspond to C in a quinonic (284.3 eV), b aromatic (285.2 eV), c phenolic (286.4 eV), d aliphatic (287.3 eV), e carboxylic (288.5 eV), and f O-alkyl (289.5 eV) functional groups.

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