Tag: receding water table

Questions Related to receding water table

About ..................... of the Earth's surface is covered with water.

biology natural resources and their conservation water resources and conservation receding water table water conservation and irrigation

  1. 21%

  2. 41%

  3. 71%

  4. 91%

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Correct Option: C

The water that is fit for use is ________.

biology natural resources and their conservation water resources and conservation receding water table water conservation and irrigation

  1. freshwater

  2. water contained in the seas and oceans

  3. water contained in rivers

  4. groundwater

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Correct Option: A
Explanation:

The water that is fit for use is freshwater.

It is estimated that in a few years from now more than _________ of the people in the world could face water scarcity.

biology natural resources and their conservation water resources and conservation receding water table water conservation and irrigation

  1. one half

  2. one third

  3. one fourth

  4. one fifth

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Correct Option: B
Explanation:

It is estimated that in a few years from now more than one third of the people in the world could face water scarcity.

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of ........................ per person per day. This amount is about ................. buckets of water per person per day.

biology natural resources and their conservation water resources and conservation receding water table water conservation and irrigation

  1. 50 litres, two and a half

  2. 25 litres, two and a half

  3. 50 litres, one and a half

  4. 75 litres, three and a half

Show answer
Correct Option: A
Explanation:

The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of 50 litres per person per day. This amount is about  two and a half buckets of water per person per day.

Choose the correct answers from the alternatives given .
Which of the following is not a property of water that helps explain why water is so important to life on earth?

evs sources of water water resources and conservation receding water table water conservation and irrigation

  1. Water expands when frozen

  2. Nonpolar compounds dissolve- well in water

  3. Water can absorb great quantities of heat with relatively-small increase in its temperature

  4. Water molecules attract each other

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Correct Option: B

Water from rivers is the only source for irrigation in the fields

evs receding water table patterns of cropping rotation of crops common irrigation systems

  1. True

  2. False

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Correct Option: B
Explanation:
  • Irrigation is the application of controlled amounts of water to plants at needed intervals. Irrigation helps to grow agricultural crops, maintain landscapes, and revegetate disturbed soils in dry areas and during periods of less than average rainfall.
  • Sources of irrigation water include groundwater, through springs or wells, surface water, through rivers, lakes, or reservoirs, or even other sources, such as treated wastewater or desalinated water.
  • Hence Water from rivers is the only source for irrigation in the fields is a false statement.
  • So, the correct answer is 'False'.

Which irrigation technique is considered the most water efficient? 

evs - i receding water table patterns of cropping rotation of crops common irrigation systems

  1. Surface

  2. Drip

  3. Sprinkler

  4. Spray

Show answer
Correct Option: B
Explanation:

Drip irrigation is most economical and efficient technique of irrigation. Watering plants by drip irrigation method is a more economical way of watering plants. In this technique, water is supplied drop by drop near the plant roots through the small opening is called as drippers. By this method, there is no loss of water due to seepage, runoff or evaporation. Thus, the correct answer is option B.

Of the following all are the traditional method of irrigation except

evs receding water table patterns of cropping rotation of crops common irrigation systems

  1. Chain pump

  2. Pulley system

  3. Persian wheel

  4. Basin irrigation

Show answer
Correct Option: D
Explanation:
Basin irrigation is a type of surface irrigation especially in regions with layouts of small fields having level surfaces and surrounded by low bunds which prevent the water from flowing to the adjacent fields. This method is generally suitable for crops that are unaffected by standing water for long periods. for e.g., rice cultivation areas.
Chain pump, pulley system, and persian wheel belongs to the traditional system of irrigation.
So, the correct answer is option D.

Which of the following irrigation procedure is/are followed when the land of cultivation is huge and the availability of water is scarce?

evs - i receding water table patterns of cropping rotation of crops common irrigation systems

  1. Drip irrigation

  2. Furrow irrigation

  3. Basin irrigation

  4. All of these

Show answer
Correct Option: A
Explanation:

A. Drip irrigation is a system of micro-irrigation system that allows the water to drip slowly to the roots of the plants.It is done in places where water is scarce. 

B. Sprinkler irrigation is the method of applying water to a controlled manner in that is similar to rainfall. This too is done to reduce the wastage of water . 
C. Furrow irrigation is conducted by small parallel channels among the field length in the direction of slope . 
D. Basin irrigation is where water is applied & distributed over the soil surface by gravity. 
So the correct options is ' Drip Irrigation & Sprinkler irrigation ' .

Fresh crop has more__________________

evs - i food for all improved methods of agriculture receding water table water conservation and irrigation

  1. Moisture

  2. Impurities

  3. Weed

  4. Stones

Show answer
Correct Option: A
Explanation:

  • The fresh crop has more moisture. Hence, they should be dried in the sun to reduce moisture before storage because if freshly harvested grains are stored they may get spoilt or attacked by organisms.

Therefore, the correct answer is option A.