Question

Give importance of soil. Explain any three factors responsible for soil formation.. Q.What is the soil erosion? Mention two main causes of it. Q. Suggest the steps to be taken to control land degradation..

Answer 1

if there is no soil no plants  no food to eat no oxygen to breath so soil plays an vital role in ur life. parental material , climate , topography etc are responsible for soil formation.washing or blowing of top layer of soil is called soil erosion.raining and stroms are main reasons for it.

Answer 2

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Soil Erosion➫ The removal of top layer of the soil by the action of wind & rainfall is called soil erosion.

♦ This is a naturally occurring process that affects all landforms.

❱ This natural process is caused by the dynamic activity of erosive agents like:-

♦ Water
♦ Ice
♦ Snow
♦ Air
♦ Plants
♦ Animals
♦ Humans

➧ Types of Erosion are:-
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[1] Splash Erosion:-

❱ The first stage in the Erosion process.
Splash Erosion results from the bombardment of the soil surface by rain drops.

[2] Sheet Erosion:-

❱ The uniform removal of soil in thin layers by the forces of raindrops & overland flow.

[3] Rill Erosion:-

❱ The removal of soil by concentrated water running through little streamlet.

[4] Gully Erosion:-

❱ The removal of soil along drainage lines by surface water runoff.

➧ Causes 0f Soil Erosion are:-
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❱ Water

❱ Winds

❱ Glacier

❱ 0ver Grazing

❱ Human Activities

➧ Factors that cause Soil Erosion are:-
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❱ Rainfall

❱ Topography

❱ 0vergrazing

❱ Deforestation

❱ Human Activities

❱ Presence of 0rganic Materials in Soil

➧ Measures to Prevent Soil Erosion are:-
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❱ Strip Farming

❱ Soil Rotation

❱ Soil Stabilisation

❱ Terrace Farming

❱ Vegetation Cover

❱ Controlled 0ver-Grazing

➧ Effects 0f Soil Erosion are:-
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❱ Landslides

❱ Flash Floods

❱ Desertification

❱ Loss of soil fertility

❱ Silting of Rivers & Lakes

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