OBIC (version 4.2.1)

calc_potassium_availability: Calculate the K availability

Description

This function calculates the K availability of a soil.

Usage

calc_potassium_availability(
  B_LU_BRP,
  B_SOILTYPE_AGR,
  A_SOM_LOI,
  A_CLAY_MI,
  A_PH_CC,
  A_CEC_CO,
  A_K_CO_PO,
  A_K_CC
)

Value

The capacity of the soil to supply and buffer potassium. A numeric value.

Arguments

B_LU_BRP

(numeric) The crop code from the BRP

B_SOILTYPE_AGR

(character) The agricultural type of soil

A_SOM_LOI

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

A_CLAY_MI

(numeric) The clay content of the soil (%)

A_PH_CC

(numeric) The acidity of the soil, measured in 0.01M CaCl2 (-)

A_CEC_CO

(numeric) The cation exchange capacity of the soil (mmol+ / kg), analyzed via Cobalt-hexamine extraction

A_K_CO_PO

(numeric) The occupation of the CEC with potassium (%)

A_K_CC

(numeric) The plant available potassium, extracted with 0.01M CaCl2 (mg / kg),

Examples

calc_potassium_availability(B_LU_BRP = 265, B_SOILTYPE_AGR = 'dekzand',
A_SOM_LOI = 4, A_CLAY_MI = 11,A_PH_CC = 5.4, A_CEC_CO = 125, 
A_K_CO_PO = 8.5, A_K_CC = 145)
calc_potassium_availability(265, 'dekzand',4, 11,5.4,  125,8.5, 145)
calc_potassium_availability(c(265,1019), rep('dekzand',2),c(4,6), c(11,14),
c(5.4,5.6),  c(125,145),c(8.5,3.5), c(145,180))