3.2. Soil quality indicators
Table 6 summarizes the effect of the different fertilizer treat- ments on the physical, chemical and biological soil quality indica- tors tested. For most of the parameters, there were no significant differences (p > 0.05) among the treatments, the exceptions being the mineralizable N content and earthworm abundance. However, there was an interesting trend (N0 < N300 < PS45) over both years monitored that might indicate a long-term benefit from fertilizer treatments, especially PS45.