This function calculates the bulk density of the soil based on texture and organic matter
calc_bulk_density(B_SOILTYPE_AGR, A_SOM_LOI, A_CLAY_MI = NULL)
(character) The agricultural type of soil
(numeric) The percentage organic matter in the soil (%)
(numeric) The clay content of the soil (%)
The bulk density of an arable soil (kg / m3). A numeric value.