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Table 3 Relative distribution (%) of signal area over chemical shift regions (ppm) in 13 C-CPMAS-NMR spectra of the composts

From: Effects of on-farm composted tomato residues on soil biological activity and yields in a tomato cropping system

  Carboxylic-C Phenolic-C Aromatic-C O-Alkyl-C CH 3 O/C-N Alkyl-C
195 to 166 ppm 165 to 146 ppm 145 to 111 ppm 110 to 61 ppm 60 to 46 ppm 45 to 0 ppm
C1 8.56 4.79 13.18 43.41 11.82 8.24
C2 7.46 4.62 13.12 44.82 12.08 17.90
C3 5.61 4.15 11.50 52.97 11.39 14.37
C4 6.25 3.75 14.55 42.41 13.05 19.99
COW 8.36 3.26 13.08 52.49 9.22 24.84