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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
Distinguish between the following pair:
Weathering and erosion
List any three factors that affect weathering.
Give one example of rapid mass movement.
Give a technical term for the following:
Peeling off of the outer layer of rock through contraction and expansion.
Say whether the following is ‘True’ or ‘False’.
Shear plane is the surface on which movement of a landslide takes place as a result of its breaking off.
How are the different kinds of soils in Temperate zones formed?
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 |
Explain the following terms.
Colloids
Give a geographical reason:
Human is an agent of weathering.
Consider the given statement and choose the right option given below.
- Small streams that join the main river is tributary.
- River Gangas is a tributary.
Which of the above statement is/are the right statement.
