Given NZ's strict biosecurity system (run by MPI) and that the research was funded/administered by MPI, I would suggest a sentence in the Materials and Methods (page 14, around lines 336 - 338) that explicitly states that all relevant biosecurity protocols/procedures were followed - and probably as importantly no fumigation etc. of the soil samples was carried out (I assume that is the case).

 Can you please confirm where the manuscript is being submitted.