← All questionsGS3 · 2016 · Agriculture ·Water-use Efficiency and Micro-irrigation
QUESTION 7
GS3
12.5 marks

What is water-use efficiency? Describe the role of micro-irrigation in increasing water-use efficiency.

WRITE IN
9 min
200 words

What the examiner wants

Define water-use efficiency and describe how drip and sprinkler irrigation raise it.

What... DescribeAnswer exactly what the question asks.

Demand-wise check

  1. 1WUE: crop output per unit of water used; India's flood irrigation efficiency is low≈35 words
  2. 2Micro-irrigation role: water to root zone, less evaporation and runoff, fertigation, higher yields, less weeds, use on undulating land≈35 words
  3. 3Constraints: high cost, small holdings, power and water pricing, maintenance≈35 words
  4. 4Policy: PMKSY 'Per Drop More Crop', Micro Irrigation Fund≈35 words

Open in about 30 words and close in about 30.

Answer plan

Define WUEMicro-irrigation methodsHow each improves WUEConstraintsSchemesConclusion

Where marks usually go

  • Not defining WUE
  • Writing on dams and canals

Draw this

  • Diagram of drip system: tank → filter → laterals → emitters at roots

Value addition

  • CommitteeTask Force on Micro Irrigation (2004, N. Chandrababu Naidu) estimated a potential of about 69.5 million hectares.Task Force, 2004
  • SchemeMicro Irrigation Fund of Rs 5,000 crore set up with NABARD in 2018-19.Ministry of Agriculture

Mapped topper copies

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