variation by ANOVA showed that there was a
significant ŽP0.01. variation in all cereals Žand
cereal products. except for flour ŽP0.10.. Analysis
by multiple comparison disclosed that, in the
case of raw rice, there were a number of pairs of
areas between which the difference was significant
ŽP0.05.. Further perusal showed that the
Cd contents in raw rice collected in area E
Žlocated alongside the coast of the sea of Japan;
Fig. 1., 70.1 ngg as GM, tended to be higher
than the values for rice samples from other areas.
Similar statistical comparison of Cd contents in
boiled rice gave only one pair of areas in which
the Cd contents were significantly different, but
the value for area E was highest of all by simple
comparison, being on line with the observation
with Cd in raw rice. When statistical evaluation
was made separately for boiled rice samples
brought from kitchens and for those bought from
stores, inter-area difference was significant ŽP
0.01. in the former samples but not in the latter
ŽP0.10.. Further comparison in area E showed