Biochar from Agricultural Residues: Carbon‑Negative Solution for India's Soil Health and Farmers

Overview India burns millions of tonnes of paddy straw each year, especially in Punjab and Haryana. The practice releases greenhouse gases, degrades air quality and wastes a resource that could improve soil fertility. Simultaneously, large areas of Indian farmland suffer from low soil organic carbon , poor water‑holding capacity and nutrient loss. Converting this biomass into biochar offers a dual solution: it prevents open‑field burning and restores soil health. Key Developments Punjab and Haryana burn > 20 million tonnes of paddy straw annually. Field trials in Maharashtra and Kerala show biochar can raise crop yields by 10‑30% and water‑holding capacity by 10‑25% . Each tonne of certified biochar can generate 2‑2.8 tCO₂e in carbon credits under the VM0042 protocol. Projects like the IIT‑Kharagpur KISAN kiln are piloting market‑linked models. Important Facts India generates about 62 million tonnes of municipal solid waste each year, with over half being biodegradable. Converting this urban organic waste, along with agricultural residues, into biochar aligns with the circular economy principle, reducing landfill methane and creating a valuable soil amendment. International examples from Kenya, Thailand and Brazil demonstrate that biochar can be scaled through robust measurement, reporting and verification systems. UPSC Relevance The topic touches multiple GS papers. It illustrates the environmental impact of residue burning (GS3: Environment), the role of innovative climate‑friendly technologies in meeting India’s NDCs (GS3: Economy), and the policy challenge of translating research into farmer‑level adoption (GS2: Polity). Understanding biochar also helps answer questions on sustainable agriculture, carbon sequestration and market‑based climate mechanisms. Way Forward To mainstream biochar, the government should: Integrate biochar production into existing schemes such as the Soil Health Card and National Mission for Sustainable Agriculture . Provide subsidies or low‑interest loans for small‑scale KISAN kiln adoption. Establish a transparent carbon‑credit registry linked to the VM0042 protocol, ensuring farmers receive fair remuneration. Promote public‑private partnerships for scaling decentralized pyrolysis units and for creating market linkages for biochar sales. By turning waste into "black gold", India can boost farmer incomes, improve soil resilience and contribute to global climate mitigation.