1.

Explain the term Decomposition.

Answer»

Earthworm is said to be 'friends‘ of farmer:

  • Breakdown the complex organic matter.
  • Loosening of the soil helps in aeration and entry of root.  

The decomposers break down complex organic matter into inorganic substances like carbon dioxide, water and nutrients, called decomposition.

Dead plant remains such as leaves, bark, flowers and dead remains of animals, including fecal matter, constitute the detritus. 

The process of decomposition completed in following steps: 

Fragmentation : Break down of detritus into smaller particles by detritivore (earthworm). 

Leaching: Water soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts.

Catabolism : Bacterial and fungal enzymes degrade detritus into simple inorganic substances. 

Humification: Accumulation of dark coloured amorphous substances called humus.


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