plzzzzz answer the questions except the red lined one . it's class 8 CBSE geography Ch 2
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Answer:
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Explanation:
7) The thin layer of grainy substance covering the surface of the earth is called soil. It is closely linked to land. Landforms determine the type of soil. Soil is made up of organic matter, minerals and weathered rocks found on the earth. This happens through the process of weathering. The right mix of minerals and organic matter make the soil fertile.
9) The major factors of soil formation are the nature of the parent rock and climatic factors. Other factors are the topography, role of organic material and time taken for the composition of soil formation. All these differ from place to place.
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10) Landslides are simply defined as the mass movement of rock, debris or earth down a slope. They often take place in conjunction with earthquakes, floods and volcanoes.
Some mitigation techniques of landslide are as follows:
• Hazard mapping locate areas prone to landslides. Hence, such areas can be avoided for building settlements.
• Construction of retention wall to stop land from slipping.
• Increase in the vegetation cover is an effective way to arrest landslide.
• The surface drainage control works are implemented to control the movement of landslide along with rain water and spring flows.
Answer:
soil fertility refers to the ability to sustain agricultural plant growth