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प्रश्न
What is humus? How is it formed? What is its significance in soil formation?
उत्तर
Humus: Humus is a dark substance formed in soils. It is a dead organic matter formed by the decay of animals and plants. Trees, shrubs, grass, and bacteria help in the formation of humus. In warmer climates, humus is destroyed by countless bacteria. In colder areas, soils are rich in humus and it is collected in the soil. Tropical humid soils are poor in humus because it is consumed by bacteria.
Humus is vital to the fertility of soils. It provides nitrogen, phosphorus, and calcium to the soils. It sustains other forms of life. It helps the weathering of minerals to add to the fertility of soils. It increases the water-holding capacity of soils.
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संबंधित प्रश्न
In which regions of the world is ‘frost action’ the common form of weathering?
Which is the most important effect of weathering?
Distinguish between each of the following: Structural plain and Depositional plains.
What are exogenic forces?
What do you understand by the following term:|
Humus
What are different types of soil according to their texture?
Explain the following terms.
Colloids
Give a geographical reason:
Slope is a major factor in mass wasting.
Consider the given statement and choose the right option given below.
- The nature and magnitude of weathering differ from place to place and region to region.
- Granular disintegration takes place due to the action of volcanoes.
- Weathering is a prerequisite in the formation of soil.
Which of the above statement is/are the right statement.
Name three types of weathering.
