MANNER synthetic-fertiliser rainfall factor.

Multiplicative ammonia-volatilisation factor for synthetic fertiliser as a function of soil pH class and the same rainfall/wetness classification used by the organic-manure rainfall_wet table in manner_params. Used by calculate_manner_nh3()'s synthetic-fertiliser path. AN and CAN are 1 for every pH class and rainfall class; AS is 1 for every pH<7 row.

Usage

manner_rain_factor

Format

A tibble with columns:

fertiliser

Synthetic fertiliser: "Urea", "AN", "CAN" or "AS".

ph_class

Soil pH class: "pH<7" or "other pH".

rainfall_class

Combined rainfall-level/wetness class (e.g. "noraindry", "heavyrainwet"), the same 9 classes as manner_params's rainfall_wet table.

factor

Numeric multiplicative rainfall factor.

Source

WHEP project-internal coefficient workbook (not a public DOI): Spain historical MANNER implementation, NH3_model.xlsx, sheet "synthetic fertilisers".

Examples

manner_rain_factor
#> # A tibble: 72 × 4
#>    fertiliser ph_class rainfall_class factor
#>    <chr>      <chr>    <chr>           <dbl>
#>  1 Urea       pH<7     noraindry        0.7 
#>  2 Urea       other pH noraindry        0.7 
#>  3 AN         pH<7     noraindry        1   
#>  4 AN         other pH noraindry        1   
#>  5 CAN        pH<7     noraindry        1   
#>  6 CAN        other pH noraindry        1   
#>  7 AS         pH<7     noraindry        1   
#>  8 AS         other pH noraindry        1   
#>  9 Urea       pH<7     norainmoderate   0.95
#> 10 Urea       other pH norainmoderate   0.95
#> # ℹ 62 more rows