Which of the following methods are used for conservation of soil?
1. Mulching
2. Contour Barriers
3. Rock Dam
4. Inter Cropping
5. Shelter Belt
6. Terrace farming
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1, 5 and 6

1, 2, 3 and 4

2, 3 and 4

All of the above

answer is D.

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Detailed Solution

Mulching: Mulching is a method of conserving soil in which the bare soil between plants is covered with a layer of organic matter such as straw.
Contour barriers: Contour barriers are contour strips that intercept descending waters and ground particles.
Rock Dam: Rocks are stacked to create a dam. These dams slow down the water flow. As a result, it prevents gullies and soil loss.
Intercropping: Intercropping is a practice where two or more crops are cultivated simultaneously in the same field.
Shelterbelt: Planting rows of trees on one side of an area prevents wind erosion of the soil. They are also known as shelterbelts.
Terrace farming: Terrace farming involves cutting flat areas of a hilly or mountainous landscape to grow crops.
All of these methods are soil conservation methods.

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