System NUE

Calculates the NUE for Spain at the provincial level. The system NUE is defined as the percentage of total nitrogen production (total_prod) relative to the sum of all nitrogen inputs (inputs) into the soil system.

Usage

calculate_system_nue(n_soil_inputs = create_n_soil_inputs(), example = FALSE)

Arguments

n_soil_inputs

A tibble of nitrogen soil input (deposition, fixation, synthetic, manure, urban). If not provided and example = FALSE, it will be computed from create_n_soil_inputs().

example

If TRUE, return a small example output without downloading remote data. Default is FALSE.

Value

A tibble with the following columns:

• year: Year

• province_name: Spanish province

• total_prod: Total nitrogen production (Mg)

• inputs: Total nitrogen inputs (Mg)

• nue_system: System-level Nitrogen Use Efficiency (%)

Examples

calculate_system_nue(example = TRUE)
#> # A tibble: 10 × 5
#>     year province_name total_prod inputs nue_system
#>    <dbl> <chr>              <dbl>  <dbl>      <dbl>
#>  1  1917 Tarragona           4740   9924       47.8
#>  2  1989 A_Coruna           27403  52128       52.6
#>  3  1967 Tenerife            2080  11614       17.9
#>  4  2010 Albacete           18671  70849       26.4
#>  5  1923 Albacete            8767  19187       45.7
#>  6  1968 Salamanca          11821  34294       34.5
#>  7  1932 Palencia            6206  15537       39.9
#>  8  1944 Almeria             2538  12783       19.9
#>  9  1911 Avila               4112  16873       24.4
#> 10  1893 Malaga              3296  13713       24