UPSC PracticeUPSC Practice
UPSC Notes

Biochar Technology and its Applications

PYQs

8

Articles

1

Momentum

21

Phase IFoundation

Background

Overview

Addresses critical issues like stubble burning, air pollution, soil degradation, climate change mitigation, farmer income, and sustainable agriculture practices, relevant for GS1 (Geography), GS3 (Agriculture, Environment, S&T).

Biochar is a carbon-rich material produced by heating biomass (like agricultural waste) in a low-oxygen environment (pyrolysis). It is highly stable and can sequester carbon in soil for long periods, while also improving soil health and agricultural productivity.

Phase IIStatic core

Facts & tables

Key facts

Production Method

Made via pyrolysis of agricultural or organic waste in low-oxygen conditions.

Composition & Properties

Carbon-rich, highly porous material that breaks down slowly in soil.

Agricultural Benefits

Enhances soil organic carbon, water-holding capacity (10-25%), nutrient retention, microbial activity, and crop productivity (10-30%).

Environmental Impact

Carbon sequestration (carbon-negative solution), reduces greenhouse gas emissions from stubble burning and landfill methane.

Reference table

Benefits of Biochar

AspectBenefit
Soil HealthIncreased organic carbon, water retention, nutrient availability
Crop Productivity10-30% improvement, enhanced resilience to stress
Climate MitigationLong-term carbon sequestration, reduced GHG emissions
Waste ManagementConverts agricultural/urban waste into valuable resource

Reference table

Static syllabus anchors

TypeReference
Conceptual areaAgriculture
Conceptual areaEnvironment & Ecology

Reference table

Institutions & roles

BodyRole
IIT-KharagpurResearch and development (kisan kiln)
International Rice Research Institute (IRRI)Research and development
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Multi-statement analysis

Prelims angle: Conceptual understanding

Quick revision

  • Carbon-rich material from pyrolysis of biomass.
  • Improves soil fertility, water retention, and crop yield.
  • Key for carbon sequestration and reducing stubble burning.
  • Supports circular economy and climate-resilient agriculture.
  • Can be integrated with carbon credit mechanisms.

High-confidence PYQs

2023Statement-based questions, Conceptual understanding

Consider the following statements : Statement-I : According to the United Nation's 'World Water Development Report, 2022', India extracts more than a quart...

Environment & EcologyOpen question
2021Factual recall, Conceptual understanding

Among the following, which one is the least water-efficient crop?

Environment & EcologyOpen question
2020Multi-statement analysis, Conceptual understanding

What are the advantages of fertigation in agriculture? 1. Controlling the alkalinity of irrigation water is possible. 2. Efficient application of Rock Phosp...

Environment & EcologyOpen question
2018Multi-statement analysis, Conceptual understanding

With reference to agricultural soils, consider the following statements : 1. The high content of organic matter in soil drastically reduces its water holdin...

Environment & EcologyOpen question
2017Multi-statement analysis, Policy measures

Consider the following statements : The nation-wide ‘Soil Health Card Scheme’ aims at 1. expanding the cultivable area under irrigation. 2. enabling the ...

EconomyOpen question
2015Cause and effect relationships, Multi-statement analysis

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture? 1. The proliferation of nitrogen-fixing microorganisms in t...

Environment & EcologyOpen question
2014Multi-statement analysis, Conceptual understanding

What is the significance of a practical approach to sugarcane production known as ‘Sustainable Sugarcane Initiative’? 1. Seed cost is very low in this compar...

Environment & EcologyOpen question
2013Factual recall, Conceptual understanding

Contour bunding is a method of soil conservation used in

Environment & EcologyOpen question

Topic timeline

AgricultureEnvironment & Ecology
Prelims 2013· Factual recall, Conceptual understanding

Contour bunding is a method of soil conservation used in

Open question
Prelims 2014· Multi-statement analysis, Conceptual understanding

What is the significance of a practical approach to sugarcane production known as ‘Sustainable Sugarcane Initiative’? 1. Seed cost is very low in this compar...

Open question
Prelims 2015· Cause and effect relationships, Multi-statement analysis

What can be the impact of excessive/inappropriate use of nitrogenous fertilizers in agriculture? 1. The proliferation of nitrogen-fixing microorganisms in t...

Open question
Prelims 2017· Multi-statement analysis, Policy measures

Consider the following statements : The nation-wide ‘Soil Health Card Scheme’ aims at 1. expanding the cultivable area under irrigation. 2. enabling the ...

Open question
Prelims 2018· Multi-statement analysis, Conceptual understanding

With reference to agricultural soils, consider the following statements : 1. The high content of organic matter in soil drastically reduces its water holdin...

Open question
Prelims 2020· Multi-statement analysis, Conceptual understanding

What are the advantages of fertigation in agriculture? 1. Controlling the alkalinity of irrigation water is possible. 2. Efficient application of Rock Phosp...

Open question
Prelims 2021· Factual recall, Conceptual understanding

Among the following, which one is the least water-efficient crop?

Open question
Prelims 2023· Statement-based questions, Conceptual understanding

Consider the following statements : Statement-I : According to the United Nation's 'World Water Development Report, 2022', India extracts more than a quart...

Open question

Biochar offers a way to turn India’s farm smoke into ‘black gold’

22 Jun 2026 · Biochar, produced from agricultural waste, offers a multi-faceted solution to India's environmental and agricultural challenges by improving soil health, sequestering carbon, and providing economic incentives for farmers.

Read article

Related topics

Current topic

Biochar Technology and its Applications

Often confused with

Carbon Credit Markets for Climate Mitigation

Open notes

Practice writing on this topic

UPSC has asked 8 linked questions on Biochar Technology and its Applications in Mains. Write an answer to one — and get it evaluated.

See Mains PYQsEvaluate an answer
Browse all topics