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Which one of the following processes during decomposition is correctly de- scribedA. Catabolism - Last step in the decom- position under fully anaerobic condi- tionB. Leaching - Water soluble inorganic nutrients rise to the top layers of soil.C. Fragmentation - Carried out by organism such as earthwormD. Humification - Leads to the accumu- lation of a dark coloured substance humus which undergoes microbial action at a very fast rate

Answer» Correct Answer - 3
(I) False, All the three processes i.e., Fragmentation, leaching and catabolism operate simultaneously and is follow~d by humification and Mineralisation. The process of decomposition is largely an oxygen requiring process. (2) F3lsc: Leaching is the moving down of water soluble inorganic nutrients into the soil horizon. (3) True. ( 4) False, Humus is highly resistant to microbial action and gets decomposed at a very slow rate


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