Estimate symbiotic biological nitrogen fixation by weeds and cover crops.

Estimates symbiotic BNF from leguminous weeds and seeded cover crops. The legume fraction is a weighted average of spontaneous weeds and seeded cover crops. Environmental modifiers activate only when their driver columns are present.

Usage

calculate_weed_bnf(x, symbiotic_params = list())

Arguments

x

A tibble with weed_npp_n_t, land_use, legumes_seeded and seeded_cover_crop_share. Optional legumes_spontaneous overrides the land-use default; the same environmental driver columns as calculate_crop_bnf() are supported.

symbiotic_params

Named list overriding the symbiotic-BNF parameters (see calculate_crop_bnf()).

Value

The input tibble with weed_ndfa_ref, weed_ndfa, weed_leg_share, f_env_weed and weed_bnf_t.

Examples

calculate_weed_bnf(
  tibble::tibble(
    weed_npp_n_t = 10, land_use = "Cropland",
    legumes_seeded = 0, seeded_cover_crop_share = 0
  )
)
#> # A tibble: 1 × 18
#>   weed_npp_n_t land_use legumes_seeded seeded_cover_crop_share n_synth_kg_ha
#>          <dbl> <chr>             <dbl>                   <dbl>         <dbl>
#> 1           10 Cropland              0                       0             0
#> # ℹ 13 more variables: n_org_kg_ha <dbl>, temp_c <dbl>, pet_mm <dbl>,
#> #   som_pct <dbl>, soil_ph <dbl>, clay_pct <dbl>, water_input_mm <dbl>,
#> #   legumes_spontaneous <dbl>, f_env_weed <dbl>, weed_ndfa_ref <dbl>,
#> #   weed_ndfa <dbl>, weed_leg_share <dbl>, weed_bnf_t <dbl>