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Livestock physical constants.

Source: R/livestock_coefs.R
livestock_constants.Rd

Named list of physical constants used in livestock emission calculations:

  • energy_content_ch4_mj_kg: 55.65 MJ/kg CH4.

  • ch4_density_kg_m3: 0.67 kg/m3.

  • vs_energy_content_mj_kg: 18.45 MJ/kg DM.

  • n_to_n2o: 44/28 (N to N2O molecular mass ratio).

  • days_in_year: 365.

  • default_de_percent: 65%.

  • default_ue_fraction: 0.04 (urinary energy as fraction of GE).

  • ev_wool_mj_kg: 24.0 MJ/kg clean wool.

Usage

livestock_constants

Format

A named list.

Source

IPCC 2019 Refinement, Vol 4, Ch 10.

Examples

str(livestock_constants)
#> List of 8
#>  $ energy_content_ch4_mj_kg: num 55.6
#>  $ ch4_density_kg_m3       : num 0.67
#>  $ vs_energy_content_mj_kg : num 18.4
#>  $ n_to_n2o                : num 1.57
#>  $ days_in_year            : num 365
#>  $ default_de_percent      : num 65
#>  $ default_ue_fraction     : num 0.04
#>  $ ev_wool_mj_kg           : num 24