Table 3. Comparison of mean DNA concentrations by weight in Mann–Whitney U test.

METHOD	MEAN RANK SOIL (N=9)	MEAN RANK INCINERATION (N=9)	MEAN RANK WATER (N=9)	MEAN RANK OVERALL N=27
RRCF	13.56	13.78	13.67	40.07
CONVENTIONAL	5.44	5.22	5.33	14.93
p value	0.001	0.001	0.001	0.001