UPSC General Studies Solved Paper - General Studies-2016

  • question_answer
    Which of the following is/are the advantage/advantages of practising drip irrigation?
    1. Reduction in weed
    2. Reduction in soil salinity.
    3. Reduction in soil erosion
    Select the correct answer using the codes given below

    A)  1 and 2

    B)         Only 3

    C)  1 and 3

    D)         None of these

    Correct Answer: C

    Solution :

    Exp. [c] Drip irrigation is a very efficient way of irrigation which not only saves water, but also reduces fertiliser consumption. It is more directed way of irrigation in which water is slowly supplied to the root of plant by channel of pipes, valves, tubing and nozzle. Drip irrigation requires little bit of investment as it requires motor, valves and network of pipes which are needed to be laid in the ground. Drip irrigation controls the soil erosion as regulated volume of water is being used so there will be no flooding and soil will remain intact but in usual irrigation, flooding can be there and it will cause removal of top layer of soil so there will be soil erosion. Due to excess of water, growth of weeds are promoted but in drip irrigation water available to weeds is less so there number will be reduced. Sometime excessive irrigation causes problem of soil salinity but this problem will not happen in case of drip irrigation. If in options 'all three correct' would have been given then alt three would be right but in this question limited choice has been provided, so among them reduction of weed and reduction of soil erosion will be best choice.

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