21.

i. Name two canal systems in Uttar Pradesh.

ii. Give three reasons to explain why canal irrigation is a popular form of irrigation in Uttar Pradesh.

Well irrigation is still practiced in many parts of the country. Give two reasons to explain why.

i. With reference to the Kharif crops, name the months when they are:

1. Sown 2. Harvested 

ii. Give an example one cereal crop and one cash crop. 

Give three reasons to explain why Japan occupies a leading among the fishing nations of the world. 

i. Which sector is a major consumer of coal as a source of power ?

ii. Mention two problems faced by the coal mining industry. 

i. With which crop is ratooning associated ?

ii. What are the types of soil that suit the cultivation of this crop ?

iii. Why is ratooning practiced ?

i. Mention three factors that affect water transport.

ii. Give one advantage and one disadvantage of water transport.

i. Give one disadvantage of air transport. Why is it still a popular means of transportation India ?

ii. Name the international airlines carrier of India. What is the name of international airport of Mumbai ?

How does the Golden Quadrilateral differ from National highways ?

What is an agro - based industry ?