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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.
Match the column
| Column A | Column B |
| 1. Granular disintegration | (i) causes feldspar to become a powdery mass |
| 2. Oxidation | (ii) is common in deserts |
| 3. Carbonation | (iii) is the simplest form of chemical weathering |
| 4. Hydration | (iv) mainly affects limestone regions |
| 5. Solution | (v) results in the rusting of iron |
Give geographical reason:
Temperature changes result in physical weathering.
What is known as exfoliation?
Rewrite the following sentence, choosing the right word from the options given below:
_______soils are those which are undisturbed by erosion or deposition.
What do you understand by the following term:
Weathering
Describe the work of plants as agents of weathering.
Give reasons for the following :
Grassland soils are less acidic than forest soils.
Explain the following terms.
Bases
Give a geographical reason:
Human is an agent of weathering.
