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Soil Organic Carbon for Food Security and Climate
Deborah BossioLead Soil Scientist
Photo Neil Palmer, CIAT
THE NATURE CONSERVANCY // 2
Why Soil Carbon?Soils contain two to three times more carbon than the atmosphere
Soil organic carbon has multiple benefits: food production, adaptation, resilience, water quality and climate mitigation
When combined with halting land use change emissions, potential to mitigate unmet burden of fossil fuel emissions (aspirational goal 3.5GtC annually)
THE NATURE CONSERVANCY // 3
From 0.90 to 1.85 PgC/yr in top 30cm
25% to 50% of the 4p1000 target
Zomer, Bossio, Sommer, Verchot TNC
CIAT in prep
Soil Carbon Sequestration on Agricultural Lands How far can we go and where?
THE NATURE CONSERVANCY // 4
Phot
o cr
edit
CIAT
How? Soil carbon sequestration with climate relevance is not business as usual
Conservation tillage
Agroforestry
Rangeland Manageme
nt
Agroecology
Organic Matter
Recycling
Sommer and Bossio, 2014
Caveats: What the timing of SOC sequestration might actually look like, phased implementation, the importance of permanence and monitoring
THE NATURE CONSERVANCY // 5
Phased implementation of soil carbon enhancing practices, and eventual saturation of soil sequestration capacity