Presenters: Joanne Ferry & Lauren Windross, Tonkin & Taylor Ltd
Presentation title: Superphosphate application to pastoral land – is it really a HAIL activity
Superphosphate has been applied to New Zealand pastoral land as a fertiliser for well over a hundred years. In the early 1990s the risk of cadmium accumulation in the soil from this activity was identified. This risk was addressed by limiting the concentration of cadmium in Superphosphate, but the effects were already being measured and limitations were placed on the use of meat products including the requirement to discard ruminant kidneys from domestic and exported animal products. The introduction of the NES for contaminated land (NES Soil) has highlighted human health concerns where pastoral land is developed for residential land use, exacerbated by increased pressure for development from urban sprawl and the desire for rural residential lifestyles. So is this normal farming practice really limiting the usefulness of pastoral land across the country? Using published information on cadmium accumulation, and results from real projects, this paper will assess the impact on human health and the environment of cadmium accumulation. The paper will then assess whether the past (and present) application of Superphosphate constitutes a HAIL activity. The paper also examines what this means for development of pastoral land under the NES Soil.
Event: WasteMINZ Conference 2014
Date: Wednesday 23 October 2014