TABLE 3.

Shannon diversity index values for 16S rRNA DGGE and nifH DGGE data sets and results of ANOVA carried out on these data

Crop management or statistical significance parameter	Shannon diversity index value forb:
	nifH DGGE band data			16S rRNA DGGE band data
	March	June	September	March	June	September
Precrop
Barley	2.26	1.67	2.67	2.88	2.82	2.03
Beans	1.33	1.87	1.81	2.63	2.56	2.71
CP
ORG	1.75	1.82	2.35	2.78	2.70	2.41
CON	1.84	1.72	2.14	2.73	2.69	2.33
FM
ORG	1.66	1.78	2.22	2.71	2.69	2.34
CON	1.93	1.77	2.27	2.80	2.70	2.41
ANOVA P valuesa
PC	<0.0001	0.154	<0.0001	<0.0001	<0.0001	<0.0001
CP	0.597	0.450	0.153	0.342	0.813	0.108
FM	0.121	0.916	0.695	0.057	0.796	0.154
CP × FM	0.381	0.537	0.546	0.584	0.407	0.514
FM × PC	0.381	0.731	0.599	0.391	0.191	0.268
CP × PC	0.558	0.037	0.859	0.696	0.441	0.539
FM × CP × PC	0.170	0.951	0.943	0.684	0.425	0.271

^aPC, previous crop; FM, fertility management; CP, crop protection.

^bBoldface is used for a significance (P) of <0.05.