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GATE CE 2020 Set 2 — Question 46

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MCQ+2 / -0.67MediumCrop Water RequirementsIrrigation Systems & Water NeedWater Resources Engineering

Water Resources Engineering → Irrigation Systems & Water Need → Crop Water Requirements

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Question

Crops are grown in a field having soil, which has field capacity of 30%30\% and permanent wilting point of 13%13\%. The effective depth of root zone is 80 cm80\text{ cm}. Irrigation water is supplied when the average soil moisture drops to 20%20\%. Consider density of the soil as 1500 kg/m31500\text{ kg/m}^3 and density of water as 1000 kg/m31000\text{ kg/m}^3. If the daily consumptive use of water for the crops is 2 mm2\text{ mm}, the frequency of irrigating the crops (in days), is
  1. A.
    7
  2. B.
    10
  3. C.
    11
  4. D.
    13

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