SSSAJ Journal of Natural Resources and Life Sciences Education
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Fig. 2. Liquid-state 13C nuclear magnetic resonance (NMR) spectra of HA, FA, and LMA derived from alkali extracts of the Oa2 horizon in Site 1 soil. HA, humic acids (16710 scans); FA, fulvic acids (14001 scans); LMA, low-molecular-weight acids (13760 scans)





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