EVS Answer The Following question.

1. Huge quantities of water are stored by building dams and bunds on rivers to obstruct the flow of water downstream.
2. Improved methods of irrigation are used which provide enough water to the plants and at the same time, help to save a lot of water.

1. To prevent damage by pests, chemicals are sprayed at the place of storage or all around it.
2. Neem leaves or some protective chemicals are mixed in the grain as their smell repels insects.
3. Storage places are kept dry and airy to prevent fungus formation.

1. Overwatering makes the land saline and fallow.
2. Overuse of chemical fertilisers leads to accumulation of excessive chemicals in the soil.
3. This reduces the fertility of the soil and reduces the productivity.

As a remedy, insecticides and pesticides are sprayed on crops or certain chemicals are rubbed on the seeds before sowing to avoid damage to crops.

Diseases and pest attacks are the reasons due to which growing crops are damaged.

1. The ‘Drip irrigation’ method makes use of pipes with holes.
2. This ensures that the required amount of water drips only near the plants.
3. This method makes full use of the water available without wasting it.

Which are the modem methods of irrigation? What are their advantages?

1. Nowadays, improved seeds are developed through research.
2. These seeds have a higher yield and can resist pest attacks.
3. Some varieties of these seeds become ripe for harvesting in a shorter period while some give a higher yield even with a low supply of water.