Question

what is soil erosion? State any one way by which it can be prevented.
what is humus?
What the role of earth worms in increasing the quantity of​

Answer 1

• Soil erosion is the washing away of the upper layer of the soil by the action of wind , water . soil erosion can be prevented by planting more and more trees ,preventing overgrazing of cattle on a particular piece of land for a long time etc.
• Humus contains decomposed remains of plants and animals. Humus is rich in organic content and thus makes soil fertile. Earth worms increase the quality of soil because when they burrow into soil they make it lose. Hence increasing water holding capacity.

hope it helps..