GBR Catchment land use and nutrient levels
information from the great Barrier Reef Marine Park Authority

The GBR catchment is the principle source of pollutants to the GBR Grazing (sediments, nutrients) Cropping (nutrients, pesticides)
Fertilizer loss from the paddock : Rates of nitrogen fertilizer use (recommended) sugar ~ 200 kg/ha/yr cotton ~ 150 kg/ha/yr bananas ~ 400 kg/ha/yr Generally >50% of fertilizer is lost from the paddock to streams, atmosphere & groundwater

water quality data sheet - example

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