Table 1.

Numbers of different bacterial OTUs (operational taxonomic units) from each treatment (UNF, unfertilized; NPK, mineral fertilized; AM, fertilized with animal manure) given as means and standard deviations from their three technical replicates.

	UNF	NPK	AM	Mean
Unfractionated soil	3, 784 ± 372	3, 418 ± 255	4, 045 ± 143	3, 749 ± 361
Sand with POMa	2, 374 ± 33	1, 670 ± 535	2, 594 ± 413	2, 213 ± 538
Coarse silt	1, 953 ± 146	1, 686 ± 178	2, 560 ± 423	2, 067 ± 456
Fine silt	2, 464 ± 186	2, 352 ± 180	2, 832 ± 148	2, 549 ± 264
Clay	3, 060 ± 12	3, 336 ± 59	3, 425 ± 220	3, 274 ± 200
Only found in unfractionated soil	227 ± 64	164 ± 32	167 ± 25	44 ± 10
Only found in size fractions	139 ± 28	149 ± 73	151 ± 41	46 ± 15

^aPOM, Particulate organic matter.