Ploughing of which one of the following is yet another human factor that leads to soil erosion?

In addition to bushes which of the following are grown along the boundary of the fields?

What does the land lose as a result of soil erosion?

What do the natural forces like wind, rain and running water help in?

Which of the following is known as the sorrow of China?

How does the soil become when trees are cut down?

What is the foundation of all life on earth?

The protection of soil against soil erosion is called:

What is falling of trees in large numbers called?

Where did River kosi caused havoc in?