Only partial characterisation of P, Le and Li is possible
with the humification parameters: with HR is
possible to distinguish Le from P and Li (Fig. 2), but not
P from Li; with DH and HI it is possible to distinguish P
from Le and Li (Figs. 1 and 3), but not Le from Li. The
EF, instead, allows a precise characterisation of different
fertilisers, and can distinguish between the different degrees
of humification of P samples.
On the base of the results shown here it is possible to
propose the following classification: