The study compares the potential mineralisation rates of nitrogen organic compounds in mineral-muck soils after soil incubation under aerobic and anaerobic conditions and investigates relationships between the mineralisation rate o nitrogen organic compounds in the soil and its organic mass and iron content. The N-NO₃ increase after soil incubation under aerobic conditions was 24 to 102% greater than the N-NH₄ increase after anaerobic incubation except for the soil with a high level of oxidised iron compounds, in which the increase in N-NO₃ was 12% lower than in N-NH₄. The mineralisation rate of nitrogen organic compounds depended on the organic mass content of the muck and on the water conditions of the sites.

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