Humus and Humic Acids of Luvisol and Cambisol of Jiguli Ridges, Samara Region, Russia

Table 4

Carbon species of humic acids on the base of 13-NMR spectra, Percentage of each carbon species to carbon in molecule.

Carbon species	Cambisol	Luvisol	RL related to cambisol	RL related to luvisol
Aromaticity	0.6	0.7	0.6	0.7
Aromatic C	29.4	42.3	23.4	34.9
Aliphatic C	18.9	13.3	18.2	18.4
Carbonylic	5.8	4.4	3.5	3.4
Carboxylic	20.3	16.8	17.5	18.8
Phenolic	6.9	7.7	5.3	7.7
Aldehyde	19.1	16.0	32.9	17.0