ResponsetoApplicantReport

Typical export rates for nutrient export are listed below. Market gardens are the
highest exporter at 26 kg N/ha/y. The estimates of nutrient loss from the
disposal area are significantly higher than those reported for market gardens and
much higher than those reported for other land uses.

I have attached a couple of references.

The Western Australian paper is of less importance. It is a modelling exercise not
a measurement process. The rate of export for the Leschernault catchment was
about 1.8 kg N/ha/y and the stream water quality was not acceptable. I am
guessing there are other factors apart from the loading rate contributing to water
quality problems in the Leschernault catchment.

Conclusion
There will be a significant reduction is storm water quality and or deep drainage
nutrient concentrations associated with the proposed nutrient loading rates
within the disposal area.