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Effect of Plant-derived solid (PDSF), mineral-derived liquid (MDLF), and plant-derived liquid (PDLF) fulvic acids (FA) on soil organic carbon, light fraction C, and heavy fraction C. Error bars represent standard errors of the means (n = 4). The least significant differences (LSD0.05) are at 5% level of significance. Different letter on top of each bar showing significant differences between treatments.
