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Soil management calculator for predicting phosphorus losses under cropping systems in Western Australia

Anderson, G., Bell, R.ORCID: 0000-0002-7756-3755, Brennan, R. and Chen, W. (2011) Soil management calculator for predicting phosphorus losses under cropping systems in Western Australia. In: 2011 WA Agribusiness Crop Updates, 23 - 24 February, Perth, Western Australia

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Agriculture in many parts of the world is coming under increasing pressure to develop management practices that will minimise phosphorus (P) loss to the environment. Water and phosphorus run-off have been monitored in a catchment studied near Jacup (Jerramungup) in the south-coast region of Western Australia (Wong, 2011 pers. comm.). The amount of phosphorus run-off was significant and resulted in phosphorus concentrations in stream water greater than the ANZECC trigger values for water quality.

A strategy to reduce phosphorus loss is to improve phosphorus fertiliser recommendations with the use of models, such as NUlogic by CSBP, used in WA. However, this model does not contain routines that allow for prediction of water and phosphorus run-off .

Work has recently been undertaken to include these routines in the nutrient and lime model, soil management calculator (SMCAL). These routines were derived from models developed in the United States (Neitsch et al., 2005; Vadas et al., 2008, 2009).

This paper applies the developed water and phosphorus run-off routines to make an assessment of the amount of water and phosphorus run-off from a shallow sandy duplex located on a 1% slope within the Jacup catchment.

Item Type: Conference Paper
Murdoch Affiliation(s): School of Environmental Science
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