Table 1. Three-way ANOVA of factors affection expansion of bacteria in sand microcosms.

		Streptomyces			Bacillus
Source of Variation		DF	F	P	DF	F	P
pore size distribution		2	56.5	<0.001	2	68	<0.001
matric potential		2	2.8	0.066	2	109.4	<0.001
time		3	249.5	<0.001	2	431.7	<0.001
PSD × MP		4	0.8	0.558	4	2	0.095
PSD × T		6	17.3	<0.001	4	69.4	<0.001
MP × T		6	0.8	0.55	4	19.2	<0.001
PDS × MP × T		12	0.6	0.883	8	2	0.051
Residual		252			189
Total		287			215

P values <0.05 (in bold) were regarded as statistically significant and p values <0.1 (in italic) display a non-significant trend towards significance.