Calculate the phosphate excess index in Germany

This function calculates the phosphate excess

Usage

osi_nut_p_de(
  B_LU,
  A_SOM_LOI,
  A_P_CAL = NA_real_,
  A_P_DL = NA_real_,
  unitcheck = TRUE
)

Arguments

B_LU

(numeric) The crop code

A_SOM_LOI

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

A_P_CAL

(numeric) The P-content of the soil extracted with ammonium lactate(mg P / kg)

A_P_DL

(numeric) The P-content of the soil extracted with double lactate (mg P / kg)

unitcheck

(character) Option to switch off unit checks (TRUE or FALSE)

Value

The phosphate excess index in Germany stimated from extractable soil P fractions. A numeric value.