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The two stages are mineralisation and humification. Mineralisation is the biological and chemical breakdown of dead plant tissues by soil microorganisms to produce simple soluble organic substances. This is the initial stage of decomposition.
The second stage is humification. Here the dead plant materials which had been mineralised are regrouped into large molecules to form humus.
Faimus answered the question on March 16, 2018 at 17:40
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