21.

a. With reference to the Rihand multipurpose project, name the states that benefit from it. 

b. Name four crops grown with the water available.

c. Name two industries which depend on the power generated.  

Discuss three problems faced by agriculture in India. 

Why are pulses an important crop in India?

What are the soil and temperature requirements for the cultivation of pulses in India. 

Bring out any three differences between tea production in India and China. 

Give any two reasons for the importance of market gardens in India. 

With reference to fishing in Cambodia, answer the following: 

a. Name the most important area where fishing is carried out. 

b. What is the most important factor that has contributed to the important of fishing?

c. Name two important centres of fishing. 

What are the industrial uses of manganeses ? 

a. Name the industrial grades of coal.

b. What are some of the problem encountered in the extraction of coal? Discuss any four of them.

c. Name a major coal producing area in India, China, Australia and Pakistan, respectively.

Name any two fields in which remote - sensing data is vital.