Bissoy.com
Doctors Medicines MCQs Q&A

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.

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. Correct Answer (c) and (d)

The correct answer is (c) and (d).

  • In India, perhaps more than 80 per cent of the available water is used for irrigation.
  • Irrigation is the controlled application of water through man-made systems to meet the water requirements of agriculture.
  • Irrigation is an artificial application of water to crops or plants, especially when an agricultural field does not get enough water through rains.

Key Points

  • Sprinkler Irrigation System 
    • ​Sprinkler irrigation system allows application of water under high pressure with the help of a pump.
    • It releases water similar to rainfall through a small diameter nozzle placed in the pipes.
    • Water is distributed through a system of pipes, sprayed into the air and irrigates in most of the soil type due to the wide range of discharge capacity.
    • Types of sprinkler irrigation system
      (i) Centre pivot
      (ii) Towable pivot
      (iii) Rain gun
      (iv) Impact sprinkler
      (v) Pop up sprinkler
      (vi) Linear move the sprinkler
    • When selecting a sprinkler system it is important to make sure that the average application rate is less than the basic infiltration rate of the soil.
      • In this way all the water applied will be readily absorbed by the soil and there should be no runoff. Hence, statement (d) is correct.
  • Sandy soils have a low water storage capacity and a high infiltration rate. Hence, statement (c) is correct.
    • Clay soils with low infiltration rates are ideally suited to surface irrigation.
    • Efficiency - [ alt="canal" src="//storage.googleapis.com/tb-img/production/21/05/canal.PNG" style="width: 348px; height: 142px;">
  • Low-head bubbler systems differ from other micro-irrigation systems because they are based on gravity-flow, can operate at pressures as low as 1 m (3.3 ft) and do not require elaborate filtration systems. Hence, statement (a) is incorrect.
  • Micro spray irrigation is a modified method of drip irrigation. Hence, statement (b) is incorrect.

Related Questions

Consider the following statements regarding irrigation: Drip irrigation system, also known as the 'trickle irrigation system' where water is applied on the soil surface at a rate lower than the infiltration rate of the soil. Sprinkler irrigation is not suitable if a site is known to be windy most of the time. Which among the following above given statements are correct?
A map shows the elevations of Darjeeling, Gangtok, Kalimpong, Pelling, and Siliguri. Kalimpong is at a lower elevation than Gangtok, Pelling is at a lower elevation than Gangtok. Pelling is at a higher elevation than Siliguri. Darjeeling is at a higher elevation than Gangtok. Which of the following statements can be inferred from the paragraph above? i. Pelling is at a higher elevation than Kalimpong ii. Kalimpong is at a lower elevation than Darjeeling iii. Kalimpong is at a higher elevation than Siliguri iv. Siliguri is at a lower elevation than Gangtok
Two centrifugal pumps P and R are available for use in a pipe flow system and their head-discharge characteristics are as follows. Pump P Pump R Discharge (cumecs) Head (m) Discharge (cumecs) Head (m) 0 40 0 45 0.12 35 0.14 40 0.2 28 0.24 35 0.3 18 0.3 28   The following statements (S1, S2, and S3) pertain to the head and discharge values during actual operation. Neglect losses in the system. Which of the following statements are correct? S1: When the two pumps P and R are connected in parallel, the discharge is 0.36 cumecs corresponding to a head of 35 m. S2: When the two pumps P and R are connected in parallel, the discharge is 0.36 cumecs corresponding to a head of 70 m. S3: When the two pumps P and R are connected in series, the discharge is 0.3 cumecs corresponding to a head of 46 m.
Consider the following statements: 1. Illite is the mineral largely responsible for the swelling and shrinkage behaviour of clayey soils. 2. A differential free swell value of 55% indicates a soil with low degree of expansiveness. 3. Higher the plasticity index of a soil, greater its swelling potential. 4. A low shrinkage limit of a soil indicates possibility of swelling at low water content. Which of the above statements are correct?
P. A weir is a hydraulic structure where majority or the entire ponding is achieved by a raised crest and smaller part or nil part by the shutters. Q. A weir is a hydraulic structure that is made by constructing the width of the channel only. R. A barrage is a hydraulic structure that is made by creating a choking condition only. S. A barrage is a hydraulic structure where majority or the entire ponding is achieved by a shutter and smaller part or nil part by the raised crest. Identify the correct statements in the above.
Consider the following statements and state what is not true of the Alluvial Soils? (a) Alluvial soils are the most widely spread soils. (b) Alluvial soils as a whole are very fertile. (c) On the basis of their age they are classified into two - old: Bangar and new: khadar. (d) Khadar soils are more fertile than Bangar (e) Alluvial soils contain an adequate proportion of potash, phosphoric acid and lime (f) Alluvial soils are ideal for sugarcane, paddy, wheat and pulses. 
Which of the following statements is/are with respect to rates in the building estimation? A) The rates for building estimation are usually taken from PWD schedule of rates, with appropriate escalation charges. B) Rates for different items in the estimate are the current rates for the completion of the items of work.
Consider the following statements and choose the correct answer:
1. Soil gets heat energy from different sources such as solar radiation, decomposing organic matter and heat formed in the interior of earth
2. The temperature of soil is not affected by its colour and altitude of the land
3. Black soils absorb more heat than white soils
4. Sandy soils absorb more heat and radiate it out quickly at night than clay or loam soils
Seven boys are living in different buildings at a different height. Abir, Ayush, Anand, Ajay, Alok, Nakul and Nandu. Ayush is living on a higher floor than Nakul and Abir. Abir lives on a higher floor than Nakul and Alok is on the lowest floor. Nandu lives in a lower height than Ayush but higher than Abir and Nakul. Ajay is the one who lives lower than Nakul. Anand lives on a higher floor than Ayush.  Find whose building is the highest one?
There are six students P, Q, R, S, T and U in class who scored some marks in their final examination. I. P is the second-lowest among all. II. Q is neither top nor least ranked among all but a higher rank than S. III. R's rank is higher than U but lower than T while U scores lower than P. IV. S is lower than T but higher than R. Who is ranked 3rd last in the class?