AMG humification coefficient by carbon input type.

Lookup table giving the AMG humification coefficient h (the fraction of carbon inputs entering the active pool) as a function of the carbon input type. Rows are matched in ascending match_order against the lowercased input type using the pattern regular expression; the last row (input type "default", with a missing pattern) is the fallthrough.

Usage

amg_h_by_input_type

Format

A tibble with columns:

match_order

Integer matching priority (lower is tried first).

input_type

Canonical input type label (e.g. "green_manure", "manure", "residue", "default").

pattern

Regular expression matched against the lowercased input type; NA for the fallthrough row.

h

Humification coefficient (fraction of input carbon stabilised).

Source

Saffih-Hdadi, K. & Mary, B. (2008). Modeling consequences of straw residues export on soil organic carbon. Soil Biology and Biochemistry, 40(3), 594-607. doi:10.1016/j.soilbio.2007.08.022 .

Examples

amg_h_by_input_type
#> # A tibble: 7 × 4
#>   match_order input_type     pattern                                        h
#>         <dbl> <chr>          <chr>                                      <dbl>
#> 1           1 green_manure   "green.?manure"                             0.2 
#> 2           2 mineral_manure "mineral.*manure|manure.*mineral"           0.3 
#> 3           3 none           "none|no_straw_no_fym|no.straw.no.fym"      0.1 
#> 4           4 manure         "fym|manure|compost|organic.?amend|slurry"  0.4 
#> 5           5 residue        "residue|straw_returned|straw\\.returned"   0.13
#> 6           6 mineral        "mineral"                                   0.13
#> 7           7 default         NA                                         0.15