Abstract:
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aDeclining water quality on the south coast of Western Australia has been associated with increasing input of nutrients, particularly phosphorus (P), from diffuse agricultural sources. A survey of surface (0-10 cm) soil properties (ammonium oxalate extractable iron, bicarbonate extractable P and K, pH, organic carbon and salinity) from 7950 sites mostly on agricultural land, along with information on fertiliser practices, land use, soil type, rainfall and time since agricultural development reveals patter
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