The correct answer is: d) All of the above
Contour farming is a method of farming that helps to prevent soil erosion by following the natural contours of the land. This helps to reduce the amount of water that runs off the land, and it also helps to keep the soil in place.
Afforestation is the process of planting trees on land that has been cleared of trees. This helps to prevent soil erosion by providing a root system that holds the soil in place. It also helps to improve the water quality by filtering out pollutants.
Construction of check dams is a method of preventing soil erosion by building small dams across streams and rivers. This helps to slow down the flow of water, which reduces the amount of soil that is eroded.
All of these methods are effective in preventing soil erosion, and they are all being used in Meghalaya to address the problem of soil erosion.
In addition to these methods, there are a number of other things that can be done to prevent soil erosion. These include:
- Reducing the amount of tillage that is done. Tillage breaks up the soil and makes it more susceptible to erosion.
- Planting cover crops. Cover crops help to protect the soil from the sun and wind, and they also help to improve the water quality.
- Mulching. Mulching helps to protect the soil from the sun and wind, and it also helps to improve the water quality.
- Avoiding activities that can damage the soil, such as driving on it or building on it.
By taking these steps, we can help to prevent soil erosion and protect our environment.