To compare the results of Tucker 3 with Igeo and RI, Mn turns to be
the severest pollutant and As did not contribute too much to the contamination
of the YRE. That is most probably because that it considers
the fractions of metals in Tucker 3 compared with Igeo and RI. Mn was
closely related to the CARB and As was related to OM which is more stable
than CARB.