Tag: receding water table

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Questions Related to receding water table

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

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

  1. one half

  2. one third

  3. one fourth

  4. one fifth
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

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

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?

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Water is a polar solvent. Therefore, nonpolar compounds do not dissolve well in water. This is a property of water, but it is not a property that explains why water is important to life; rather, it is a limitation.

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

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

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice evs - i receding water table patterns of cropping rotation of crops common irrigation systems

Which irrigation technique is considered the most water efficient? 

  1. Surface

  2. Drip

  3. Sprinkler

  4. Spray
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

Of the following all are the traditional method of irrigation except

  1. Chain pump

  2. Pulley system

  3. Persian wheel

  4. Basin irrigation
Reveal answer Fill a bubble to check yourself
D Correct answer
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.
Multiple choice evs - i receding water table patterns of cropping rotation of crops common irrigation systems

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

  1. Drip irrigation

  2. Furrow irrigation

  3. Basin irrigation

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
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 ' .

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

Fresh crop has more__________________

  1. Moisture

  2. Impurities

  3. Weed

  4. Stones
Reveal answer Fill a bubble to check yourself
A Correct answer
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.