Soil Resources

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Soil erosion means

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The removal of the top soil cover by water, wind and human activities

Front

What leads to Sheet erosion on hilly slopes?

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Deforestation

Front

How are Gullies formed?

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Absence of vegetation leads to formation of rills and then during heavy rains Gullies are formed.

Front

Removal of vegetation for land use like railways, roads, buildings and agriculture has caused: Rill erosion, Sheet erosion, Gully erosion, All of the above

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All of the above

Front

Wind moves soil particles that are: 0.1-0.6mm, 0.1-0.5mm, 0.1-0.7mm

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0.1-0.5mm

Front

saltation means

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0.1-0.5mm– size soil particles bouncing or hopping fashion due to wind

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Soil creep is

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greater than 0.5mm– size soil particles moving in rolling fashion due to wind

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Wind erosion occurs in areas that have sandy or coarse bare soils (without any vegetation).

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True

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Occurs on gentle slopes, and is slow removal of thin layer of Soil.

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Sheet erosion

Front

Continuation of sheet erosion for long finger shaped rills or grooves are formed is called

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Rill erosion