Ash content of manure as percent of dry matter,
used in VS calculation (Eq 10.24).
A tibble with category, ash_percent.
Source
IPCC 2019 Refinement, Vol 4, Ch 10.
Examples
ipcc_tier2_manure_ash
#> # A tibble: 9 × 2
#> category ash_percent
#> <chr> <dbl>
#> 1 Cattle 8
#> 2 Buffalo 8
#> 3 Sheep 8
#> 4 Goats 8
#> 5 Swine 4
#> 6 Poultry 25
#> 7 Horses 20
#> 8 Camels 8
#> 9 Mules and Asses 8
