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प्रश्न
How is humus formed?
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उत्तर
Humus is formed when plant residues decay into humic substances, or organic matter that has reached maturity. This process is known as humification.
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संबंधित प्रश्न
Write whether the statement are true or false. Correct the incorrect one.
The breaking down of rocks into smaller particles is called weathering.
Complete the flowchart below.
Say whether the following is ‘True’ or ‘False’.
In dry climates mechanical weathering is dominant.
Say whether the following is ‘True’ or ‘False’.
External forces are engaged only in erosion
Describe the chief characteristics of weathering.
Distinguish between:
Weathering and Denudation
Rewrite the following sentence, choosing the right word from the options given below:
_______is produced by the decayed organic material, including dead leaves, stems roots, living bacteria, fungi, worms, and other organisms.
Match the following pairs correctly:
| A | B |
| (a) A soil formed at a place or a particular site | Alluvium |
| (b) Over a long period of time this soil become mature | Transported soil |
| (c) It is most fertile soil when renewed every year | Podzol |
| (d) This soil is found is cool or cold humid areas | Residual |
Describe the work of plants as agents of weathering.
Explain the following terms.
Bases
