Methane conversion factors (percent) by manure management system and
climate zone, using "All" for the systems that take a single factor.
Source
Predominantly the 2006 Guidelines, Vol 4, Ch 10, Table 10.17, whose cool/temperate/warm structure this table follows. The 2019 Refinement's Table 10.17 (Updated) is resolved by ten climate zones and by liquid-system retention time instead, and differs in level: it gives a single 0.47 percent for pasture/range/paddock against 1.0/1.5/2.0 here, and 1.0/2.0/2.5 for static-pile and passive-windrow composting against 0.5/0.5/0.5 and 1.0/1.0/1.5 here. Some cells match neither edition: dry lot 1.5/2.5/4.0 (both editions give 1.0/1.5/2.0), intensive-windrow composting 0.5/0.5/0.5 (both give 0.5/1.0/1.5) and pit storage under one month 3/3/5 (2006 gives 3/3/30). Where a 2006 row is resolved per degree Celsius the value taken is not always the mid-point of the class (uncovered anaerobic lagoon temperate 73 percent is the 14 degree column, not the 78 percent of 20 degrees); tracked in whep#601.
Examples
ipcc_2019_mcf_manure
#> # A tibble: 47 × 3
#> system climate_zone mcf_percent
#> <chr> <chr> <dbl>
#> 1 Pasture/Range/Paddock Cool 1
#> 2 Pasture/Range/Paddock Temperate 1.5
#> 3 Pasture/Range/Paddock Warm 2
#> 4 Daily Spread Cool 0.1
#> 5 Daily Spread Temperate 0.5
#> 6 Daily Spread Warm 1
#> 7 Solid Storage Cool 2
#> 8 Solid Storage Temperate 4
#> 9 Solid Storage Warm 5
#> 10 Dry Lot Cool 1.5
#> # ℹ 37 more rows