Organic Carbon in Agricultural Soil: ICAR's Stark Warning
India’s arable soils are losing organic carbon at an alarming rate, with key states like Punjab, Haryana, and Western Uttar Pradesh showing severe depletion. This isn’t speculative—data from the Indian Council of Agricultural Research (ICAR) confirms a dangerous decline driven by unbalanced fertilizer usage and rising temperatures. The ramifications are enormous: reduced agricultural productivity, greater greenhouse emissions, and weakened climate resilience. Yet, the institutional response has been patchy at best.
The ICAR study found that **soils in regions with intensive fertilizer use, especially urea and phosphorus, are experiencing a rapid loss of organic carbon**. Haryana and Punjab, infamous for their shallow reliance on chemical-heavy practices, now serve as cautionary tales. In contrast, Bihar demonstrated better organic carbon health due to more balanced nutrient application—a notable exception among the northern states. Equally revealing was the study’s geographical correlation: hilly soils, typically richer in organic carbon due to slower decomposition rates, starkly contrast with degraded lowland soils, especially in hotter states like Rajasthan.
How is Soil Health Governed Today?
The Soil Health Card (SHC) Scheme, introduced in 2015 under the Ministry of Agriculture, was meant to change how Indian farmers manage their lands. SHC aims to provide farmers with scientific data on soil conditions, ensuring balanced fertilization. In theory, it complements the broader **Soil Health Management (SHM)** initiative under the **National Mission for Sustainable Agriculture (NMSA)**. SHM focuses on organic farming and integrated nutrient management practices, much needed for reversing India’s over-reliance on chemical fertilizers.
These efforts received a boost through integration with **Rashtriya Krishi Vikas Yojana (RKVY)**, creating a single coordinated framework under its Soil Health and Fertility component. Mobile soil testing labs, digital tracking systems, and school-based programs have added infrastructure support. Here’s the tension, though: **₹586 crore was allocated for SHC in 2023**, yet independent assessments reveal gaps between distribution targets and farmer engagement. The government’s target to cover more than 14 crore farmers annually under SHC appears overly ambitious against these constraints.
The Root Problems of Fertilizer Imbalance
What the ICAR study unpacks is more than just nutrient excess—it exposes systemic issues in India’s agricultural policy. While balanced fertilizer use is encouraged, incentives for fertilizer procurement have historically favored nitrogen-heavy urea. Ninety percent of fertilizer subsidies in India still cater to urea—a skewed pattern dating back to the Green Revolution. Phosphorus and potassium pricing mechanisms, less subsidized, further distort actual farmer practices.
Bihar’s relative success, attributed to balanced nutrient use, highlights what happens when local extension services align with policy intentions. However, this is inconsistent across states. The worst-hit areas—Punjab and Haryana—are tied to wheat-paddy monocultures that amplify carbon loss. Diversified cropping systems, linked to better organic carbon health (especially rice-pulse systems), remain underfunded. Compounding this imbalance is climate change, with hotter regions showing accelerated organic decomposition. At stake are ecosystems where **SOC levels below 0.25%** already create compounding agro-environmental vulnerabilities—an indictment of both unscientific farming models and failure in climate adaptation.
Rainfall and cropping systems also emerge as key determinants. Water-intensive crops like rice maintain higher soil carbon due to increased microbial activity. This advantage should inspire efforts to incentivize pulse cultivation alongside rice—a strategy used successfully in states like Andhra Pradesh. Wheat and coarse-grain systems, inherently reliant on drier cycles, have shown poorer organic carbon retention, with Rajasthan and Telangana representing worst-case scenarios. Policy-level nudges could leverage these study findings to target such regions specifically.
Structural Policy Tensions
Despite the framing around “scientific soil management” under the SHC and SHM schemes, the reality shows weak implementation. Farmers routinely report that the reports generated by SHC are often incomprehensible due to technical jargon or poorly communicated through local agricultural extension offices. This oversight leaves soil testing labs underutilized. Another challenge emerges at the state-level interface: agriculture may be a state subject under the Constitution, yet much of the funding for soil health programs flows top-down from the Centre. This divide creates frictions in rollout across states.
For example, Punjab, despite being one of the largest recipients of fertilizer subsidies, has struggled to implement wide-scale changes because crop pricing remains controlled at the national level. The Minimum Support Price (MSP) for wheat and paddy inadvertently discourages crop diversification—why grow pulses when guaranteed procurement doesn’t sufficiently reward them? Without market reforms that incentivize diversification, soil health interventions remain surface-level talk.
What Can India Learn from China?
China offers an instructive counterpoint. Recognizing the impact of agricultural practices on soil degradation, the Chinese government developed **region-specific fertilizer guidelines** with strict enforcement mechanisms tied to subsidies. Unlike India’s blanket subsidy for urea, China incentivizes balanced fertilization based on actual soil nutrient demands. Moreover, China has embedded organic carbon into its policy framework through **the Soil and Water Conservation Law of 2011**, creating penalties against overuse and environmental degradation. India’s SHC lacks punitive teeth, relying solely on voluntary behavioral change—a weakness that limits its transformative capacity.
Restoring Soil Organic Carbon: Metrics to Track
To measure progress against ICAR’s findings, the success of future policies must extend beyond surface data like fertilizer usage rates. Metrics such as regional organic carbon levels, adoption rates of crop diversification programs, and measurable reduction in nitrogen-heavy fertilizer dependency will serve as key indicators. Importantly, decentralizing the SHC scheme with greater state-level autonomy could bridge operational gaps.
However, questions remain—and the ICAR study does not fully address them. How will funding requirements scale, given the dwindling overall allocation toward agriculture in successive Union Budgets? What alternative mechanisms exist to address climate-specific vulnerabilities? Until better planning leads us there, the warnings from ICAR risk being buried under bureaucracy.
Practice Questions (Prelims)
- Which scheme aims to provide Indian farmers with detailed nutrient status reports for their soil?
- A. Rashtriya Krishi Vikas Yojana
- B. National Mission for Sustainable Agriculture
- C. Soil Health Card Scheme
- D. National Agroforestry Policy
- Which cropping system shows higher soil organic carbon due to increased microbial activity?
- A. Wheat and coarse grains
- B. Cotton and sugarcane
- C. Rice and pulses
- D. Maize and millet
Practice Question (Mains)
Critically evaluate whether the Soil Health Card Scheme has succeeded in addressing India's soil organic carbon degradation. Highlight structural limitations in coordination and implementation.
Practice Questions for UPSC
Prelims Practice Questions
- Skewed fertilizer incentives that favor nitrogen-heavy urea can undermine balanced nutrient application at the farm level.
- Higher temperatures can accelerate decomposition of organic matter, contributing to SOC decline in hotter regions.
- Hilly soils generally have lower SOC than lowland soils because erosion dominates over decomposition controls.
Which of the above statements is/are correct?
- The SHC Scheme aims to support balanced fertilization by providing farmers scientific information on soil conditions.
- Integration of soil health efforts with RKVY is intended to create a single coordinated framework under a Soil Health and Fertility component.
- Because agriculture is a Union subject, the Centre can implement soil health programmes uniformly without state-level friction.
Which of the above statements is/are correct?
Frequently Asked Questions
Why does declining soil organic carbon (SOC) matter for India’s agriculture and climate goals?
SOC is central to soil fertility and productivity, so its rapid loss can directly reduce yields and weaken resilience to climate stresses. The article links SOC depletion to higher greenhouse emissions and reduced climate resilience, making it both an agronomic and environmental governance issue.
How does fertilizer imbalance contribute to SOC depletion, as indicated by the ICAR study?
Regions with intensive use of urea and phosphorus are reported to experience rapid SOC loss, indicating that nutrient excess and skewed application can degrade soil quality. The subsidy structure historically favors nitrogen-heavy urea, distorting farmer choices and aggravating unbalanced nutrient management.
What explains differences in SOC across regions such as hills, lowlands, and hotter states?
Hilly soils tend to retain more organic carbon because decomposition is slower, while degraded lowland soils show lower SOC, especially where temperatures are higher. Hotter regions accelerate organic matter decomposition, worsening SOC decline and increasing agro-environmental vulnerability.
How are the Soil Health Card (SHC) Scheme and Soil Health Management (SHM) intended to improve soil governance?
SHC (2015) aims to provide farmers scientific data to enable balanced fertilization, while SHM under NMSA promotes organic farming and integrated nutrient management. Their integration with RKVY’s Soil Health and Fertility component, along with mobile labs and digital tracking, is meant to create a coordinated implementation framework.
What implementation and federalism challenges are highlighted in soil health programmes?
Independent assessments cited in the article point to gaps between distribution targets and genuine farmer engagement, with SHC reports often too technical and poorly communicated by extension systems. A structural tension also arises because agriculture is a state subject, yet funding flows top-down from the Centre, creating friction in rollout across states.
Source: LearnPro Editorial | Environmental Ecology | Published: 10 November 2025 | Last updated: 3 March 2026
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