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_)
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)
Value
The phosphate excess index in Germany stimated from extractable soil P fractions. A numeric value.
Examples
osi_nut_p_de(B_LU = 265, A_SOM_LOI = 4.5, A_P_CAL = 45,A_P_DL = 5)
#> [1] 0.9042996
osi_nut_p_de(B_LU = c(265,1019),A_SOM_LOI = c(4,6),
A_P_CAL = c(35,54),A_P_DL = c(3.5,5.5))
#> [1] 0.9133229 0.8954250