Document ID: chunk:federal_register_of_legislation:F2013C00288:reg:7:p4
Version: federal_register_of_legislation:F2013C00288
Segment Type: reg
Provision Reference: reg 7 (pt 4/4)
Character Range: 1635575–1637602

the Australian plant toxicity data and relationship 5 was used to normalise all the Australian microbial process toxicity data.

Of the European relationships, 8 rather than 7 was used for barley as it contained fewer parameters and had a marginally higher r2 value. Relationship 11 was used for tomato rather than relationships 9 and 10, as Fe oxide content of soils was not reported in the vast majority of the toxicity data and as relationship 11 had a lower gradient than relationship 10. For E. Fetida, relationship 13 was used as it had a lower gradient than relationship 12. Similarly, relationship 16 for F. candida was used rather than relationships 14 or 15 as it had a lower gradient.

All the toxicity data for European plant species, apart from barley, was normalised using relationship 11 for tomato as it was the plant relationship with the lowest gradient. All the European invertebrate toxicity data was normalised using relationship 13 for E. fetida as it was the invertebrate relationship with the lowest gradient and relationship 18 for SIR was used to normalise all European microbial process toxicity data (except that for maize residue mineralisation and potential nitrification rate) as it was the microbial process relationship with the lowest positive gradient.

All the Cu toxicity data in Tables 47–49 was normalised to its equivalent toxicity in the recommended Australian reference soil (Schedule B5b) (Table 6). Depending on the conditions under which the toxicity tests were conducted, the normalised toxicity data could be higher or lower in the reference soil compared to the original toxicity data in the test soil.

Table 50. Normalisation relationships for the toxicity of copper (Cu) to plants, soil invertebrates and soil processes. The relationships used to normalise the toxicity data are in bold.
Eqn no.                            Species/soil process              Y parameter                         X parameter(s)                                  Reference
Australian relationships