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Table 3 The content of humic fractions in WDC and AC

From: Effect of humic substances and clay minerals on the hydrosorption capacity of clay particles in meadow soils (Middle Priamurje, Far East of Russia)

Fraction Horizon % Soil organic carbon
Humic acids Fulvic acids
HA1 HA2 HA3 ΣHA FA1a FA1 FA2 FA3 ΣFA
WDC Ag 0.76 0 0.13 0.89 0.18 0.48 0.13 0.12 0.91
Elcg 4.04 1.94 2.02 8.00 3.16 3.08 2.79 0.64 9.67
Btg1 2.01 0 1.46 3.47 1.09 2.29 0.76 0.13 4.27
AC Ag 19.90 0 6.03 25.93 3.34 9.30 1.86 5.06 19.56
Elcg 11.75 0 6.12 17.87 8.92 6.32 10.67 0.12 26.03
Btg1 17.87 0 6.92 24.79 10.13 1.33 10.82 0 22.28
  1. HA1, HA2, HA3 fractions of humic acids, FA1a, FA1, FA2, FA3 fractions of fulvic acids [26], ΣHA sum of humic acid fractions, ΣFA sum of fulvic acid fractions