Function to calculate and evaluate the N buffering capacity of soils in view of water purification for surface quality

This function gives the NSW score of the BBWP framework

Usage

bln_bbwp_nsw(
  ID,
  B_LU_BRP,
  B_SOILTYPE_AGR,
  B_SC_WENR,
  B_AER_CBS,
  B_GWL_CLASS,
  B_SLOPE_DEGREE,
  A_SOM_LOI,
  A_N_RT,
  D_RO_R,
  D_SA_W,
  B_N_RT = NA_real_,
  B_RO_R = NA_real_,
  B_RO_R_SD = NA_real_,
  B_N_RT_SD = NA_real_,
  B_CT_NSW,
  B_CT_NSW_MAX = 5,
  penalty = TRUE
)

Arguments

ID

(character) A field id

B_LU_BRP

(numeric) The crop code

B_SOILTYPE_AGR

(character) The agricultural type of soil

B_SC_WENR

(integer) The risk for subsoil compaction as derived from risk assessment study of Van den Akker (2006). Options include: 1,2,3,4,5,10,11,401,901 and 902.

B_AER_CBS

(character) The agricultural economic region in the Netherlands (CBS, 2016)

B_GWL_CLASS

(character) The groundwater table class

B_SLOPE_DEGREE

(numeric) The slope of the field (degrees)

A_SOM_LOI

(numeric) The organic matter content of the soil (%)

A_N_RT

(numeric) The organic nitrogen content of the soil in mg N / kg

D_RO_R

(numeric) The risk that surface water runs off the parcel

D_SA_W

(numeric) The wet perimeter index of the field, fraction that field is surrounded by water

B_N_RT

(numeric) The mean organic nitrogen content of the soil in the LSW region (mg N / kg). Optional.

B_RO_R

(numeric) The mean D_RO_R of the soil in the LSW region. Optional.

B_RO_R_SD

(numeric) The variance in D_RO_R in the LSW region (standard deviation). Optional.

B_N_RT_SD

(numeric) The variance in organic nitrogen content of the soil in the LSW region (standard deviation) (mg N / kg). Optional.

B_CT_NSW

(numeric) the critical target for required reduction in N loss from agriculture (kg N / ha) to reach targets of KRW

B_CT_NSW_MAX

(numeric) the max critical target for N reduction loss (kg N / ha)

penalty

(boolean) the option to apply a penalty for high risk BBWP field indicators. Default is TRUE.