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Calculate the phosphate availability index in the Netherlands

Source: R/bln_prod_phosphor.R
bln_c_posphor.Rd

This function calculates the phosphate availability.

Usage

bln_c_posphor(B_LU, A_P_AL = NA_real_, A_P_CC = NA_real_, A_P_WA = NA_real_)

Arguments

B_LU

(numeric) The crop code

A_P_AL

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

A_P_CC

(numeric) The P-content of the soil extracted with CaCl2

A_P_WA

(numeric) The P-content of the soil extracted with water

Value

The phosphate availability index in the Netherlands estimated from extractable soil P fractions. A numeric value.

Details

The category a cultivation supplied by B_LU belongs to determines which P extraction parameter are required. Not supplying the correct P parameter for a cultivation results in the function returning NA. The cultivation categories can be found in table bln_crops, column crop_cat1. Column crop_code in this table should correspond to the B_LU input of bln_c_posphor.

There are four cultivation categories: grass, maize, arable, and nature. Grass and maize classified cultivations require the parameters A_P_AL and A_P_CC, arable cultivations require A_P_WA, and nature does not require any P parameter. The phosphate availability index for nature defaults to 0.

Examples

bln_c_posphor(B_LU = 265, A_P_AL = 45, A_P_CC = 2.5)
#> [1] 0.9069136
bln_c_posphor(B_LU = c(265,1019),A_P_AL = c(35,54),A_P_CC = c(2.5,4.5), A_P_WA = c(35,65))
#> [1] 0.9180670 0.9966953