LOAECLowest Observable Adverse Effect Concentration
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An important consideration in comparing the LOAECS from a range of different studies is that no single biological criterion is used.
1995) list LOAECs for individual heavy metal effects on soil microbial biomass and on a Rhizobium species or clover yield (Table 17).
The LOAECs shown in Table 17 are generally significantly below the current Australian and NZ guideline values for metals in soil, and indeed are well below background values for some elements for Australian soils (Table 16).