Soil Carbon & Forest Biomass Stock (2026 Field Guide)
IPCC tracks trees, roots, litter, deadwood, and soil carbon.
Standard agricultural soil sampling measures the top 30 cm.
Multiply bulk density, depth, and carbon fraction for tC/ha.
Rock fragments over 2 mm hold no organic carbon in soil.
Tree DBH, height, and wood density estimate living biomass.
Roots typically add 20% to 27% more carbon below ground.
One tonne of elemental carbon equals 3.67 tonnes of CO2e.
Cover crops and reduced tillage build topsoil carbon stocks.
Verified soil and forest baselines support carbon reporting.
Tap below to open our Forest & Soil Carbon Stock Calculator.