Mollic Epipedon

Comparison of organic carbon from humic and fulvic acids and the degree of humification in five soil orders

“…The type A humification grade is presented in soils with horizon A (soils in grasslands), without anthropic intervention. In these soils of the order Mollisol, humic acids are often preserved for relatively long periods (>3000 years), linked to clayhumus complexes (Tsutsuki et al, 1988;Bockheim, 2014). In these soils, it is possible to detect highly moistened humified humic acids in the outer horizons.…”