TABLE 2. Relative and absolute frequencies of sites containing microorganisms in histomicrobiological slices.

Groups	Number of roots	Number of histological slices	Number of evaluated sites	Percentage of roots with sites containing Microorganisms	Number of sites containing microorganisms	Percentage of sites containing microorganisms
Control	8	160	960	100.0%	860	87.6%
1	18	294	1,746	100.0%	1,180	67.6%
2	20	330	1,980	100.0%	1,237	62.5%
3	16	306	1,836	100.0%	1,436	78.2%
4	18	304	1,824	100.0%	1,131	62.0%