Table 1. PERMANOVA test for group centroids.

	Df	SumsOfSqs	MeanSqs	F.Model	R2	Pr(>F)
Sample	1	0.11984	0.119842	3.4296	0.27592	0.005
Residuals	9	0.31449	0.034943	0.72408
Total	10	0.43433	1.00000

Note: Bray-Curtis distances were used. The analysis compared microbial communities from soil samples taken from maize roots with bulk-soil controls, taken at a distance of 30 cm from the plants.