Partition crop and weed NPP into dry matter, carbon and nitrogen.

Converts crop NPP components (product, residue, root) and weed biomass to nitrogen and carbon using the bio_coefs per-component coefficients and the weed_coefs scalars. Root and weed below-ground nitrogen include rhizodeposits. Root carbon uses root_c_kgdm, which includes root biomass carbon plus rhizodeposit carbon per tonne of root dry matter; use root_mass_c_kgdm in bio_coefs for root tissue carbon alone. The residue-to-soil split is computed only when a residue_soil_dm_t column (from calculate_residue_destinies()) is present.

Usage

calculate_npp_carbon_nitrogen(x)

Arguments

x

A tibble with item_prod_code, product_dm_t, residue_dm_t and root_dm_t. Optional weed_ag_dm_t (above-ground weed dry matter; treated as 0 when absent), crop_npp_dm_t (kept when present) and residue_soil_dm_t (enables the soil-residue nitrogen and carbon split).

Value

The input tibble with weed dry matter, and nitrogen (*_n_t) and carbon (*_c_t) for product, residue, root, weeds, crop NPP and total NPP.

Examples

tibble::tibble(item_prod_code = "15", production_t = 100, area_ha = 40) |>
  calculate_crop_npp() |>
  calculate_npp_carbon_nitrogen()
#> # A tibble: 1 × 31
#>   item_prod_code production_t area_ha product_dm_t yield_dm_t_ha residue_dm_t
#>   <chr>                 <dbl>   <dbl>        <dbl>         <dbl>        <dbl>
#> 1 15                      100      40         87.9          2.20         136.
#> # ℹ 25 more variables: method_residue <chr>, root_dm_t <dbl>,
#> #   method_root <chr>, crop_npp_dm_t <dbl>, weed_ag_dm_t <dbl>,
#> #   weed_bg_dm_t <dbl>, weed_npp_dm_t <dbl>, weed_ag_n_t <dbl>,
#> #   weed_bg_n_t <dbl>, weed_npp_n_t <dbl>, weed_ag_c_t <dbl>,
#> #   weed_bg_c_t <dbl>, weed_npp_c_t <dbl>, total_npp_dm_t <dbl>,
#> #   product_n_t <dbl>, residue_n_t <dbl>, root_n_t <dbl>, crop_npp_n_t <dbl>,
#> #   total_npp_n_t <dbl>, product_c_t <dbl>, residue_c_t <dbl>, …