Table 3. Average values and standard deviation for the properties analized in this study.

	Control	B1	B2	B3	B4
Soil microbial biomass	186±78 a	269±87 b	255±133 b	259±87 b	239±78 ab
Soil respiration	14.54±1.82 a	33.95±10.79 d	25.27±3.49 c	17.46±2.74 b	18.33±3.11 b
Bacterial biomass	7.70±1.36 a	7.59±3.23 a	8.42±1.23 a	8.36±0.85 a	7.96±1.89 a
Fungal biomass	1.23±0.59 a	1.44±0.48 ab	1.62±0.57 b	1.47±0.65 ab	1.32±0.56 ab
Actinomycetes	1.86±0.33 a	1.78±0.72 a	1.78±0.26 a	2.09±0.39 a	1.96±0.57 a
AM fungi	0.34±0.13 a	0.41±0.12 ab	0.44±0.12 b	0.41±0.17 ab	0.44±0.22 b
Fungi to bacteria ratio	0.15±0.05 a	0.20±0.05 b	0.20±0.06 b	0.17±0.06 ab	0.16±0.04 a
Gram+ to gram- bacteria	2.57±0.11 ab	2.78±0.45 c	2.73±0.32 bc	2.46±0.07 a	2.71±0.18 bc

Different letters in the same row are indicating statistical significant differences (3-way ANOVA, P<0.05). Each mean value for control, B1, B2, B3 and B4 is the average of 16 values (two soils x presence or absence of earthworms x 4 replicates).