calc_pmn: Calculate the index for the microbial biological activity
Description
This function assesses the microbial biological activity (of microbes and fungi) via the Potentially Mineralizable N pool, also called PMN (or SoilLife by Eurofins in the past).
Usage
calc_pmn(B_LU_BRP, B_SOILTYPE_AGR, A_N_PMN)
Value
the normalized potentially mineralizable Nitrogen pool (mg N / kg), a numeric value.
Arguments
B_LU_BRP
(numeric) The crop code from the BRP
B_SOILTYPE_AGR
(character) The agricultural type of soil
A_N_PMN
(numeric) The potentially mineralizable N pool (mg N / kg soil)