Picture a farmer standing at the edge of a bare field in April, waiting to sow the next crop. The soil looks the same either way. But underneath, one field is quietly holding onto every drop of water it can. The other is losing it fast, to the sun, to the wind, to a hard crust that won’t let rain soak in. The difference between those two fields comes down to a few simple choices, made weeks before a single seed goes into the ground.
📌 Must Know
Three Practices That Conserve Water
- Zero or Reduced Tillage Zero or reduced tillage leaves the soil undisturbed. This helps the soil retain moisture and lowers evaporation losses. For zero tillage’s own wider farming and carbon benefits, see EnvEco0179 — Zero Tillage.
- Gypsum Before Irrigation Applying gypsum before irrigating a field improves soil structure and prevents crusting. This allows better water infiltration, so less irrigation is needed overall.
- Crop Residue Cover Allowing crop residue to remain on the field conserves water. The residue reduces direct evaporation from the soil surface and lowers soil temperature.
- ICAR Findings ICAR field studies in the Indo-Gangetic Plains found zero tillage with residue retention gave 10-17% higher yields than conventional tillage. Better soil moisture was part of the reason.
💡 Good to Know
Why Each Practice Actually Works
- Soil Structure Matters Gypsum supplies calcium, which helps clay particles clump together instead of forming a hard crust. A crusted surface sheds water instead of absorbing it.
- Not Just Leftover Waste Crop residue is often burned to clear fields quickly, but that destroys its moisture-saving and soil-building value, and adds to air pollution instead.
- Compounding Benefits These three practices work best together. Undisturbed soil plus residue cover plus better infiltration adds up to more saved water than any one practice alone.
📝 Exam Point of View
UPSC CSP 2017: Which Practices Help
- UPSC 2017 All three practices help conserve water in agriculture: reduced or zero tillage, applying gypsum before irrigation, and leaving crop residue on the field. See UPSC CSP 2017 GS Paper I, Q71.
- The Trap Gypsum before irrigation sounds like a soil-fertility trick, not a water one. UPSC is testing whether you know its actual mechanism, better infiltration.
✅ Test Yourself
🌟 Great to Know
Water Conservation Is a National Priority
- Agriculture’s Big Share Agriculture uses the largest share of India’s freshwater withdrawals, so even modest efficiency gains at the field level add up to major water savings nationally.
- Beyond Field Practices Micro-irrigation, drip and sprinkler systems, tackles the same problem from a different angle, cutting water use by 30-50% compared to flood irrigation.
- A Policy Umbrella Government schemes bundle these practices, tillage, residue management, and irrigation efficiency, under the same broader water-security push.
Why Good Advice Doesn’t Always Get Followed
- A Real Trade-off In Punjab, a paddy farmer harvests in October and needs wheat sown within days. Leftover stubble takes about six weeks to decompose naturally, time the farmer doesn’t have.
- Why Burning Wins Setting the stubble alight clears a field in minutes, for free. Managing it properly can cost close to Rs 4,000 an acre, and compensation promised by courts often never reaches farmers.
- The Real Cost That shortcut is a major contributor to the smoke that blankets Delhi-NCR every winter. The “obviously right” practice loses out to time pressure and money, not ignorance.
- Why This Matters It’s a reminder that a technically correct answer, like “retain crop residue,” can still fail in the real world unless the incentives support it too.
📰 Current Affairs
Per Drop More Crop Crosses 115 Lakh Hectares (2026)
- The Milestone By July 2026, the Per Drop More Crop (PDMC) scheme had brought over 115 lakh hectares under micro-irrigation, covering roughly 8.11% of India’s net sown area. (Source: PIB)
- Who It Reached The scheme has benefited 12.30 lakh farmers so far, around 20% of them women, with subsidies of 55% for small and marginal farmers and 45% for others. (Source: PIB)
- Where It Sits PDMC runs as a component of the Pradhan Mantri Krishi Sinchayee Yojana (PMKSY), supporting drip and sprinkler systems for up to five hectares per beneficiary. (Source: PIB)
Beyond the answer
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📚 Keep reading
IndEco0025 — Irrigation Systems in IndiaEnvEco0089 — Conservation Agriculture: The Three Real PrinciplesEnvEco0179 — Zero Tillage: How It Changes Wheat and Rice FarmingIndEco0085 — Drip and Micro-Irrigation in India: Every Drop CountedIndGeo0009 — Geography of Indian Agriculture: Crop Belts and Soil Regions❓ Practice this topic
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