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प्रश्न
Write the different steps taken in humification and mineralisation during the process of decomposition.
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उत्तर
Dead plant remains such as leaves, bark, flowers and dead remains of animals, including fecal matter, constitute detritus, which is the raw material for decomposition. Humification and mineralization occur during decomposition in the soil. Humification leads to accumulation of a dark coloured amorphous substance called humus that is highly resistant to microbial action and undergoes decomposition at an extremely slow rate. Being colloidal in nature it serves as a reservoir of nutrients. The humus is further degraded by some microbes and release of inorganic nutrients occur by the process know as mineralisation.
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संबंधित प्रश्न
Common detritivores in our ecosystem are ______.
Distinguish between production and decomposition.
Find out the INCORRECT statement
What could be the reason for the faster rate of decomposition in the tropics?
How do you distinguish between humification and mineralisation?
The rate of decomposition of detritus is affected by the abiotic factors like availability of oxygen, pH of the soil substratum, temperature etc. Discuss.
A farmer harvests his crop and expresses his harvest in three different ways.
- I have harvested 10 quintals of wheat.
- I have harvested 10 quintals of wheat today in one acre of land.
- I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing.
Do the above statements mean one and the same thing. If your answer is yes, give reasons. And if your answer is ‘no’ explain the meaning of each expression.
Assertion (A): Decomposition process is slower if detritus is rich in lignin and cutin.
Reason (R): Decomposition is largely an oxygen requiring process.
Which organisms are primarily responsible for fragmentation in the decomposition process?
What characteristic of humus allows it to act as a nutrient reservoir?
