HGW: Manganese, Average total content (surface)
Description
The mean is the median (synonym: 50. percentile, central value). It is the value above or below which 50% of all cases of a data group are located. The total content is determined from the aqua regia extract (according to DIN ISO 11466 (1997)). The concentration is given in mg/kg. The BBodSchV (1999) does not set precautionary values for manganese. According to LABO (2003) a sample count of >=20 is required for the calculation of background values. However, the map also shows groups with a sample count >= 10. This information is then only informal and not representative.
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