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Apply IPCC manure-management losses to the collected manure streams.

Source: R/manure_management.R
apply_management_losses.Rd

Nets the nitrogen surviving manure management onto the field, applying the IPCC 2019 management-loss fractions to the collected/housed streams from split_manure_management(): applied_n = n_stream * (1 - FracLossMS) where FracLossMS = FracGasMS + FracLeachMS + EF3 + FracN2MS. The grazing (pasture/range/paddock) stream is deposited in situ and keeps its full nitrogen (its in-situ soil losses belong to the soil stage). Indirect N2O is reported as a labelled sub-flux of the already-removed volatilized and leached nitrogen (the same N is not removed twice). Carbon applied to the field is applied_n times the post-storage manure C:N (the solid/liquid/excreta value for the stream's management system), so the applied C:N reflects storage, not fresh excreta; the carbon and volatile-solids storage losses follow from that.

Usage

apply_management_losses(split, options = list())

Arguments

split

A tibble from split_manure_management().

options

A named list. method selects the loss method ("ipcc_2019_tier2").

Value

The input rows with manure_type, applied_n, applied_c, applied_vs, n_volatilized, n_leached, n2o_direct_n, n2_n, n2o_indirect_n, c_lost, vs_destroyed and method_losses.

Examples

excretion <- tibble::tribble(
  ~year, ~territory, ~sub_territory, ~livestock_category,
  ~n_excretion, ~c_excretion, ~vs_excretion,
  2020L, "ES", NA, "Cattle_milk", 100, 1900, 60
)
apply_management_losses(split_manure_management(excretion))
#> # A tibble: 4 × 19
#>    year territory sub_territory livestock_category species_gen mms_type         
#>   <int> <chr>     <lgl>         <chr>              <chr>       <chr>            
#> 1  2020 ES        NA            Cattle_milk        Cattle      Pasture/Range/Pa…
#> 2  2020 ES        NA            Cattle_milk        Cattle      Solid Storage    
#> 3  2020 ES        NA            Cattle_milk        Cattle      Liquid/Slurry    
#> 4  2020 ES        NA            Cattle_milk        Cattle      Daily Spread     
#> # ℹ 13 more variables: manure_type <chr>, stream <chr>, applied_n <dbl>,
#> #   applied_c <dbl>, applied_vs <dbl>, n_volatilized <dbl>, n_leached <dbl>,
#> #   n2o_direct_n <dbl>, n2_n <dbl>, n2o_indirect_n <dbl>, c_lost <dbl>,
#> #   vs_destroyed <dbl>, method_losses <chr>