GK
SOIL EROSION AND CONSERVATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Leaching only
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Utilization by plants
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Both (a) and(b)
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Chemical reactions
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Detailed explanation-1: -The effects of soil erosion go beyond the loss of fertile land. It has led to increased pollution and sedimentation in streams and rivers, clogging these waterways and causing declines in fish and other species. And degraded lands are also often less able to hold onto water, which can worsen flooding.
Detailed explanation-2: -Causes – Over-grazing, Deforestation, Action of wind, water, glacier, etc. Topography viz. steep slopes & heavy rainfall; Faulty methods of agriculture, over – irrigation, shifting agriculture etc; Other anthropogenic factors viz. mining, industrial activities etc.
Detailed explanation-3: -In sheet and raindrop erosion, water causes the removal of soil cover and in gully erosion, water and wind both cause the removal of soil erosion. There are some preventive measures for reducing soil erosion including mulching, terrace farming, intercropping, contour ploughing, shelterbelts, contour barriers etc.