from an ecological perpective, the indirect tests are less relevant than those that evaluate the soil as a whole, but they reflect the risk of potential contamination of surface water and groundwater, and thus, the retention function of soil.
The extremely high mortality observed for the aquatic organisms tased in the water extracts of the soils suggests that the retention function of the initial soil was severely affected, and that the risk of diffusive conramination of the amendments, especially compost, led to a decrease of the toxicity of extracts due to the pH increase and TEs availability reduction ( as reflected by the significant correlations found between these parameters)