Soil carbon sequestration modeling, agroforestry carbon stock analysis, livestock methane reduction science, and wetland/grassland restoration β grounded in USDA ARS and NRCS climate-smart agriculture research.
USDA NRCS soil carbon sequestration rates by practice and region. Auto-populates SF27-S.001 Soil Carbon inputs.
USDA ARS enteric fermentation and manure management emission factors. Auto-populates SF27-S.003 Methane inputs.
Compare net farm carbon sequestration against livestock emissions to determine overall farm carbon balance.
Model SF27-S.001
Estimates annual soil organic carbon (SOC) sequestration from conservation practices. Uses IPCC Tier 1 stock change factors and USDA NRCS regional benchmarks for cover cropping, no-till, and reduced tillage systems.
Model SF27-S.002
Estimates above-ground and below-ground carbon stocks in agroforestry systems. Uses allometric equations from USDA Forest Service and IPCC Tier 1 biomass expansion factors for common tree species.
Model SF27-S.003
Calculates total GHG emissions from enteric fermentation and manure management. Converts CHβ to COβe using IPCC AR6 GWP100 of 29.8. Estimates emission reduction from feed additives and manure management improvements.
Model SF27-S.004
Models carbon sequestration from wetland restoration and grassland conservation. Incorporates soil carbon accumulation, avoided emissions from prior land use, and IPCC Tier 1 wetland carbon stock factors.
These calculators apply IPCC Tier 1 stock change factors, USDA NRCS soil carbon benchmarks, and USDA ARS GHG emission factors. Carbon quantities expressed as tonnes of COβ equivalent (tCOβe) using IPCC AR6 GWP100 values (CHβ = 29.8, NβO = 273). For voluntary carbon market use, results should be verified against Verra VCS, Gold Standard, or USDA's own Climate-Smart Agriculture framework. These tools support USDA RCPP, CRP, and EQIP program planning.
1 tonne C = 3.667 tCOβ Β· CHβ GWP100 = 29.8 Β· NβO GWP100 = 273 Β· Source: IPCC AR6 WG1 (2021)