Table 2.

Beta diversity statistics relating communities by urea treatment at each sampling site.

Site	Urea add (μg N/g soil)	0	100	500
Becker	0		0.35, 0.003	0.85, <0.001
	100	2.48, 0.004		0.74, <0.001
	500	8.36, <0.001	6.47, <0.001
Crookston	0		<-0.01, 0.44	0.40, 0.001
	100	1.23, 0.051		0.29, 0.007
	500	4.71, <0.001	3.93, 0.004
Lamberton	0		0.07, 0.118	0.25, 0.003
	100	1.28, 0.106		0.16, 0.020
	500	2.40, 0.006	1.94, 0.004
Waseca	0		0.35, 0.005	0.25, 0.001
	100	3.62, 0.005		0.12, 0.082
	500	1.96, 0.068	1.35, 0.198
Rosemount (tilled)	0		0.33, 0.002	0.42, <0.001
	100	2.83, 0.001		0.25, <0.001
	500	3.78, <0.001	2.25, <0.001
Rosemount (non-tilled)	0		0.20, 0.008	0.60, <0.001
	100	1.92, 0.004		0.10, 0.048
	500	3.61, <0.001	1.42, 0.075
St. Paul (corn)	0		0.05, 0.167	0.64, <0.001
	100	1.55, 0.015		0.56, <0.001
	500	8.03, <0.001	6.91, <0.001
St. Paul (soybean)	0		0.20, 0.026	0.56, <0.001
	100	1.53, 0.006		0.23, 0.008
	500	3.13, <0.001	1.77, 0.033

ANOSIM R-values and P-values are presented in the top matrix for each soil type. AMOVA F-statistic and P-values are presented in the bottom matrix for each soil type. Significance values are shown in bold. All statistics were evaluated at Bonferroni-corrected α = 0.02.