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. 2017 Feb 3;7:41965. doi: 10.1038/srep41965

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Cumulative CO₂ efflux (mg CO₂ kg⁻¹ soil; (A) and dissolved organic carbon (DOC; (B) in control (CS) grass litter-amended (LS), and grass litter-iron oxide nanoparticles amended soil (LNPS). Values are means of three replicates (n = 3) with error bars (±1) represent standard error of the mean. Significant difference among treatments and time represented by small letter at 5% probability level.