How and to what extent would micro-irrigation help in solving India's water crisis ?

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Ghissu Editorial · Accepted Answer

Micro-irrigation eases India's water crisis by cutting field losses, relieving aquifers and raising crop per drop, but only partially. Paddy and sugarcane resist conversion, and saved water often expands irrigated area, the paradox of irrigation efficiency documented in Science in 2018.

**Introduction**

NITI Aayog's Composite Water Management Index (2018) found 600 million Indians facing high to extreme water stress, and groundwater meets nearly 62% of irrigation needs (PIB, 2026). Micro-irrigation targets the largest demand, but only part of the crisis.

**How Micro-Irrigation Eases the Water Crisis**

1. **Cutting field losses**: Drip and sprinklers replace flooding, where water is lost to evaporation and runoff, so the same crop needs far less water, as Karnataka's community drip project at Ramthal in Bagalkot shows.
2. **Relieving aquifers**: Lower pumping slows falling water tables in over-exploited blocks and trims the power subsidy bill in Punjab and Rajasthan.
3. **More crop per drop**: Fertigation raises yields and saves fertiliser, while less leaching protects groundwater quality and prevents waterlogging and salinity.
4. **Delivery models**: Gujarat Green Revolution Company, PMKSY's Per Drop More Crop and NABARD's Rs 5,000 crore Micro Irrigation Fund spread adoption.

**The Extent: Limits of a Technical Fix**

SKETCH: spectrum | Water Saved by Crop
left: Large saving
right: Marginal saving
- Orchards and vegetables
- Cotton and sugarcane
- Wheat under sprinklers
- Flooded paddy

1. **Crop mismatch**: Paddy and sugarcane, the thirstiest crops, are the hardest to convert, and Maharashtra's 2017 drip push for sugarcane has moved slowly.
2. **Rebound effect**: Saved water often expands irrigated area, the "paradox of irrigation efficiency" (Grafton et al., Science, 2018).
3. **Adoption barriers**: High cost, small holdings and weak servicing keep coverage far below the 69.5 million hectare potential estimated by the 2004 Task Force.
4. **Wider crisis**: Urban leakage, pollution and lost wetlands lie outside the farm.

**Conclusion**

Micro-irrigation can solve the crisis only partially. Paired with water-wise cropping, metered power and groundwater caps, it can make agriculture the biggest saver of water.

How and to what extent would micro-irrigation help in solving India's water crisis ?

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