- Agricultural Emissions and the Role of Land Use
- Soil Carbon Sequestration
- Challenges in Carbon Management
- Carbon Markets and Policy Instruments
As the global community faces mounting challenges from climate change, the agricultural sector stands at a critical intersection between being a contributor to greenhouse gas (GHG) emissions and serving as a potential solution. Agricultural land management, particularly through strategies that enhance soil carbon sequestration, plays a significant role in carbon projects aimed at climate mitigation. While agriculture is traditionally associated with food production, it is increasingly recognized for its potential to reduce atmospheric carbon dioxide (CO₂) and improve environmental resilience.
Agricultural Emissions and the Role of Land Use
Agriculture is responsible for approximately 10 to 15 percent of global GHG emissions, and this figure rises to nearly 30 percent when emissions from deforestation and land-use changes are included. These emissions arise from multiple sources. Nitrous oxide is released from the use of synthetic fertilizers, methane is emitted during livestock digestion and rice cultivation, and carbon dioxide is produced when forests are cleared to create new farmland.
Yet, unlike many other sectors, agriculture also has the unique ability to draw down atmospheric carbon through photosynthesis and store it in soils, which offers an avenue for long-term climate mitigation.
Soil Carbon Sequestration
Soil carbon sequestration is a process in which atmospheric carbon dioxide is absorbed by plants during photosynthesis and subsequently stored in the soil as organic carbon. This occurs through the incorporation of plant residues, root biomass, compost, and manure into the soil, where they decompose and become stabilized as part of the soil’s organic matter.
Agricultural practices such as cover cropping, no-till or reduced tillage, use of organic fertilizers, crop rotation involving legumes, and agroforestry have been found to improve carbon storage in soils. Additionally, converting degraded lands into productive use and restoring peatlands can substantially increase carbon sequestration. These practices not only enhance carbon capture but also improve soil structure, fertility, water retention, and resilience to droughts.
Read more:
Regenerative Agriculture: A Path to Carbon Sequestration and Soil Health
Challenges in Carbon Management
Source photo: Pexel
The implementation of soil carbon sequestration in carbon markets faces several key challenges. Accurate measurement is difficult due to variability in soil conditions and the complexity of sampling methods. Soil carbon is also non-permanent and can be quickly lost if land management practices change.
Additionally, sequestration rates are relatively low, requiring large-scale adoption to make a significant impact, which is difficult in areas with smallholder farmers due to high costs and administrative burdens. There’s also a risk of leakage, where reduced production in one area shifts emissions elsewhere, undermining the climate benefits.
Carbon Markets and Policy Instruments
Various policy tools aim to integrate agricultural land management into climate strategies, including offset programs like the CDM and VCS. However, these face challenges in agriculture due to measurement difficulties and system variability. More flexible approaches like NAMAs focus on broader national outcomes rather than individual projects.
The voluntary carbon market supports diverse agricultural projects but often lacks standard monitoring protocols. Some countries, like Australia and Canada, use domestic programs based on models and default values to reward sustainable practices, simplifying implementation but raising concerns about accuracy and impact. Agricultural land management, especially soil carbon sequestration, holds potential for climate mitigation.
However, integrating it into carbon markets is challenging due to agriculture’s complexity. Instead of relying solely on offset markets, broader policies and incentives that reflect agriculture’s diverse roles are more effective. Future climate policies should align mitigation with adaptation, emphasize sustainability, and support farmers.
Funding whether from international, national, or integrated programs must facilitate this transition. To achieve a low-carbon, climate-resilient future, inclusive and science-based agricultural policies are crucial. Soil can be a solution, not just a productive area. But without proper documentation, the potential carbon stored within it may not be recorded in the carbon market. IML Carbon is ready to assist you in developing the Project Design Document (PDD) and all other technical requirements for soil carbon sequestration-based projects.
Author: Ainur Subhan
Editor: Sabilla Reza
Reference:
Muller, A. (2012). Agricultural land management, carbon reductions and climate policy for agriculture. Carbon Management, 3(6), 641–654. https://doi.org/10.4155/cmt.12.64