[Answered] Examine the ecological and economic consequences of ‘chemical exhaustion’ in Punjab’s agriculture. Evaluate how decentralised extension strategies like ‘Khet Bachao Abhiyan’ address this crisis.

Introduction

The Economic Survey 2025-26 highlights soil degradation as a key productivity constraint, while Budget 2026-27 strengthens sustainable agriculture. Punjab’s chemical exhaustion exemplifies why restoring soil health has become an economic, ecological and food-security imperative.

What is Chemical Exhaustion?

Chemical exhaustion refers to the declining productive capacity of soils caused by prolonged, imbalanced use of synthetic fertilizers and pesticides, resulting in deteriorating soil biology, nutrient imbalance and rising dependence on external chemical inputs.

Ecological Consequences

1. Declining Soil Organic Carbon (SOC): Continuous wheat-paddy monoculture and excessive urea reduce soil microbial diversity. Punjab’s organic matter is nearly 0.5% against the desirable minimum of 1% (PAU). Reduced water-holding capacity and nutrient cycling. Example: Punjab soils.
2. Nutrient Imbalance and Micronutrient Deficiency: Skewed NPK application encourages deficiencies of Zinc, Sulphur, Boron and Iron.  Fertilizer Response Ratio declines over time. Example: Indo-Gangetic Plains.
3. Groundwater Pollution: Excess nitrogen leaches as nitrates into aquifers. Causes eutrophication and public health risks (Blue Baby Syndrome). Example: Malwa region.
4. Biodiversity Loss: Declining earthworms and beneficial microbes reduce natural soil fertility. Pollinator decline affects horticulture. Example: FAO Soil Biodiversity findings.
5. Climate Vulnerability: Degraded soils store less carbon and moisture. Higher emissions of nitrous oxide (GHG nearly 300 times stronger than CO₂). Example: IPCC Agriculture Report.
6. Food Safety Concerns: Chemical residues accumulate through biomagnification. Linked with long-term health concerns. Example: High pesticide belts of Punjab.

Economic Consequences

1. Diminishing Marginal Returns: More fertilizer produces smaller yield gains, rising input-output imbalance. Example: Green Revolution belt.
2. Rising Cost of Cultivation: Farmers spend increasingly on fertilizers, pesticides and irrigation with declining profitability despite stable yields. Example: CACP estimates.
3. Agrarian Debt Trap: High production costs push small farmers towards indebtedness.
   Example: Punjab and Vidarbha.
4. Fiscal Burden: Fertilizer subsidy exceeds ₹2 lakh crore in recent years. Encourages excessive urea consumption. Example: Union Budget.
5. Threat to Food Security: Long-term productivity declines threaten cereal output. Example: Rice-Wheat System.
6. Export Competitiveness: Higher residue levels risk rejection in international markets.
   Example: EU food safety standards.

How Decentralised Extension Strategies like Khet Bachao Abhiyan Address the Crisis

1. Soil-Test Based Nutrient Management: Encourages “right fertilizer, right dose, right time.” Promotes scientific nutrient application. Example: Soil Health Card.
2. Integrated Nutrient Management (INM): Combines chemical fertilizers with compost, biofertilizers and green manure. Restores soil biology while maintaining yields. Example: Sunnhemp cultivation.
3. Village-Level Scientific Outreach: Scientists directly engage farmers through demonstrations. Converts laboratory knowledge into field practices. Example: PAU-KVK Langroya.
4. Community-Based Institutions: Involves Panchayats, SHGs, FPOs and cooperative societies. Creates peer learning and behavioural change. Example: Sarpanch Sammelan.
5. Capacity Building: Farmers trained in seed production, composting and nutrient management. Enhances local self-reliance. Example: Green manure seed programme.
6. Counterfeit Input Regulation: Joint enforcement with Agriculture Department. Prevents fake fertilizers and pesticides. Example: Enforcement drives.
7. Convergence with Government Schemes: Links farmers with: PM-PRANAM, Soil Health Card Scheme, National Mission on Sustainable Agriculture (NMSA). Example: Scheme convergence.
8. Public Health Awareness: Educates rural households on links between soil quality and nutrition. Example: Home Science outreach.

Limitations of the Present Model

1. Awareness alone cannot overcome distorted fertilizer pricing.
2. Limited extension manpower.
3. Low adoption among tenant farmers.
4. Weak market incentives for diversified crops.
5. Fragmented advisory services.

Way Forward

1. Reform Fertilizer Subsidy: Shift gradually towards nutrient-neutral DBT and encourage balanced fertilizer consumption.
2. Promote Crop Diversification: MSP and procurement support for pulses, oilseeds and millets. Example: Millet Mission.
3. Strengthen Digital Agriculture: AI-enabled soil advisory through Digital Agriculture Mission and satellite-based nutrient mapping. Example: Agristack.
4. Carbon Farming Incentives: Reward farmers for improving Soil Organic Carbon. Example: Carbon credits.
5. Expand Bio-input Ecosystem: Support SHGs and FPOs producing biofertilizers and compost. Example: NABARD.
6. Strengthen Extension System: Increase KVK funding and farmer-scientist interface and promote climate-smart agriculture. Example: ICAR.
7. Behavioural Change: Transition from input-intensive to knowledge-intensive farming. Example: Farmer Field Schools.

Conclusion

Echoing Dr. M.S. Swaminathan’s vision of an “evergreen revolution,” restoring soil through community-led scientific extension, balanced nutrition and institutional reforms is indispensable for resilient agriculture, farmer prosperity and long-term food security.