Soil carbon-to-nitrogen ratios for organic-matter balances.

Soil carbon-to-nitrogen ratios used to convert a soil organic carbon stock change into net nitrogen mineralization (when carbon is lost) or net nitrogen sequestration (when carbon accumulates), by cropland class and management system.

Usage

soil_cn_ratios

Format

A tibble with columns:

cropland_class: Land class: "Cropland" or "NonCropland".
management: Management system: "Conventional" or "Organic". Only the "Conventional" rows are selectable by this package. build_carbon_balance() has no management dimension – it is a global gridded balance – so an argument for this column could only be set world-wide, and "run the whole world as organic" is not a run anyone should perform. The "Organic" rows therefore ship as reference values for downstream consumers, not as inputs this package can be asked to use (issue 809).
cn_ratio: Soil organic-matter carbon-to-nitrogen ratio.
cn_mineralization: Carbon-to-nitrogen ratio applied when soil organic carbon is mineralized (net carbon loss).
cn_sequestration: Carbon-to-nitrogen ratio applied when soil organic carbon is sequestered (net carbon gain).

Source

Soil carbon-to-nitrogen ratios from the Spain historical SOC pipeline coefficient set, consistent with the RothC framework of Coleman, K. & Jenkinson, D. S. (1996). doi:10.1007/978-3-642-61094-3_17 .

Examples

soil_cn_ratios
#> # A tibble: 4 × 5
#>   cropland_class management   cn_ratio cn_mineralization cn_sequestration
#>   <chr>          <chr>           <dbl>             <dbl>            <dbl>
#> 1 Cropland       Conventional       10                 8               11
#> 2 Cropland       Organic            10                 9               13
#> 3 NonCropland    Conventional       15                11               15
#> 4 NonCropland    Organic            15                11               15