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1996-7 and 2002-3, the area under canal irrigation declined by 2.4 million ha (13.8 percent), the area under tank irrigation fell by 1.4 million ha (42.4 percent), and the area irrigate by all other sources declined by 1 million ha (28 percent). The only irrigation source that increased its share was groundwater wells, by 2.8 million ha (more than 9 percent) Why has such a change in irrigation demands happened? 1. Not enough supply of water from canals 2. More tubewell irrigation by farmers in the source areas of rivers 3. High cost of irrigation water, and  diversion for non-farm use 4. Joint use of water not possible due to social and economic inequalities
If one plots the tank irrigation in India and superimposes it with map of well irrigation, one may find that the two are negatively related. Which of the following statements explain the phenomenon? 1. Tank irrigation predates well irrigation. 2. Tank irrigation is in the areas with impervious surface layers. 3. Well irrigation requires sufficient groundwater reserves. 4. Other forms of irrigation are not available. Select the correct answer using the code given below.
If one plots the tank irrigation in India and superimposes it with map of well irrigation,one may find that the two are negatively related. Which of the following statements explain the phenomenon?1. Tank irrigation predates well irrigation.2. Tank irrigation is in the areas with impervioussurface layers.3. Well irrigation requires sufficientground water reserves.4. Other forms of irrigation are not available.Select the correct answer using the code given below.
The area in which inferior crops can be grown without irrigation is called:
Which of the following statement is correct regarding dry land/wetland farming? 1) In dry land farming region, the annual rainfall is 150 cm. 2) In wetland farming region, water intensive crops such as rice, sugarcane and jute are grown. 3) In dry land farming region, drought resistant crops are grown. Select the correct answer using the code given below.
Lands or climate, that are neither arid nor strictly humid in which inferior crops can be grown without irrigation is called -
Depending upon the source from which the water is drawn, flow irrigation can be sub-divided into 1.River canal irrigation 2. Reservoir or tank irrigation 3. Combined storage and lift irrigation 4. Combined storage and diversion irrigation Which of the above designations are relevant?
Which of the following statements are correct? (a) Low head bubbler irrigation is a modified method of sprinkler irrigation. (b) Micro spray irrigation is a modified method of sprinkler irrigation. (c) Water application efficiency is usually higher in clayey soils than sandy soils. (d) In sprinkler irrigation system water is applied at lower rates than soils in filterability to prevent ponding and surface run off.
A state in India has the following characteristics: 1. Its northern part is arid and semiarid. 2. Its central part produces cotton. 3. Cultivation of cash crops is predominant over food crops. Which one of the following states has all of the above characteristics? 
Which of the following statement is/are incorrect about Canal Irrigation? Canal irrigation provides safety from droughts and it brings fertile sediments to the fields. The main concentration of canal irrigation is in the southern plains. The percentage of canal irrigation area to total irrigated area in the country has fallen from about 40% in 1950-51 to less than 25% at present. Select the incorrect code from below.