SoilManageR (version 1.0.1)

CN_input_amendments: Estimate C and N inputs of organic amendments

Description

Estimates the carbon (C) and total nitrogen (N) input into the soil system by organic amendments.

Usage

CN_input_amendments(
  amount,
  amd_type = NA,
  DMC = NA,
  C_content = NA,
  N_content = NA,
  return.comment = FALSE,
  concentration_liquids = 0.5
)

Value

a tibble with the following parameters:

• C_input_org: C input by organic ammendment (kgC/ha)

• N_input_org: N input by organic ammendment (kgN/ha)

• comment (optional): Source of information on properties of organic amendment

Arguments

amount

Amount of organic amendment in fresh weight (t/ha)

amd_type

Type of organic manure, there are default values available for "Slurry_dairy_cow", "Manure_dairy_cow", "Slurry_cattle", "Manure_cattle", "Slurry_pig", "Manure_pig", "Compost", "Biorga_Quick_12N" and others (see CN_input_amendments_LUT)

DMC

dry matter content of the organic amendment (gDM/kgFM)

C_content

C content of the dry matter (gC/kgDM)

N_content

N content of the dry matter (gN/kgDM)

return.comment

(optional): logical value if comments are returned or not. Default = FALSE

concentration_liquids

concentration factor for liquid amendments. Default value is .5.

Details

The C and N inputs by organic amendments is calculated based on the dry matter content (DMC) and the C and N content of the dry matter of the amendment. If the contents are not specified, default values from the Swiss fertilizer recommendations GRUD2017_ch8SoilManageR are assumed. The default values are available the look-up-table CN_input_amendments_LUT For all slurries and liquid amendments (DMC < 150 g/kg), a dilution of 50% is assumed if default DMC values from the CN_input_amendments_LUT are used.

References

See Also

• C_input() to calculate C inputs for a management_df

• N_input() to calculate N inputs for a management_df

• C_input_crops() to calculate C inputs by crops

• C_input_cover_crops() to calculate C input for cover crops

• CN_input_amendments_LUT() for the look-up-table for organic amendments reference values

Examples

#example where amount, dry matter content, C and N content are known.
CN_input_amendments(40, DMC = 300, C_content = 300, N_content = 30)

#example where only amount and type of amendment are known 
CN_input_amendments(20, "Manure_pig")

#example of a diluted slurry
CN_input_amendments(20, amd_type = "Slurry_dairy_cow", DMC = 50)