Subsoil nitrate reduction shares by source, climate and irrigation.

Fraction of leaching nitrate reduced (denitrified) in the subsoil below the rooting zone, by nitrogen source, climate zone and irrigation category. Applied after topsoil denitrification to compute the nitrate that reaches groundwater.

Usage

subsoil_no3_reduction

Format

A tibble with columns:

fert_type

Nitrogen source: one of "Synthetic", "SOM", "Deposition", "Solid", "Excreta_cattle_monog", "Excreta_other", "Liquid", "Urban", "BNF".

climate

Climate zone: "MED" or "ATL".

irrig_cat

Irrigation category: "Rainfed" or "Irrigated".

no3_red

Fraction of leaching nitrate reduced in the subsoil.

Source

Spain historical nitrogen coefficient workbook (N_coefficients.xlsx, sheet Subsoil_NO3_denitrif), parameterised from Mediterranean and Atlantic subsoil denitrification literature consistent with the IPCC (2019) indirect N2O framework.

Examples

subsoil_no3_reduction
#> # A tibble: 36 × 4
#>    fert_type  climate irrig_cat no3_red
#>    <chr>      <chr>   <chr>       <dbl>
#>  1 Synthetic  MED     Rainfed       0.2
#>  2 Synthetic  MED     Irrigated     0.4
#>  3 Synthetic  ATL     Rainfed       0.5
#>  4 Synthetic  ATL     Irrigated     0.6
#>  5 SOM        MED     Rainfed       0.2
#>  6 SOM        MED     Irrigated     0.4
#>  7 SOM        ATL     Rainfed       0.5
#>  8 SOM        ATL     Irrigated     0.6
#>  9 Deposition MED     Rainfed       0.2
#> 10 Deposition MED     Irrigated     0.4
#> # ℹ 26 more rows