OBIC (version 4.2.3)

calc_magnesium_availability: Calculate the capacity of soils to supply Magnesium

Description

This function calculates an index for the availability of Magnesium in soil

Usage

calc_magnesium_availability(
  B_LU_BRP,
  B_SOILTYPE_AGR,
  A_SOM_LOI,
  A_CLAY_MI,
  A_PH_CC,
  A_CEC_CO,
  A_K_CO_PO,
  A_MG_CC,
  A_K_CC
)

Value

An index representing the availability of Magnesium in a soil. 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 percentage organic matter in 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+ per kg), analyzed via Cobalt-hexamine extraction

A_K_CO_PO

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

A_MG_CC

(numeric) The plant available content of Mg in the soil (mg Mg per kg) extracted by 0.01M CaCl2

A_K_CC

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

Examples

calc_magnesium_availability(B_LU_BRP = 265, B_SOILTYPE_AGR = 'dekzand',
A_SOM_LOI = 3.5,A_CLAY_MI = 8.5,A_PH_CC = 5.4, 
A_CEC_CO = 185,A_K_CO_PO = 4.5,A_MG_CC = 125,A_K_CC = 65)