Improving fertiliser management: redefining the relationship between soil tests and crop responses for wheat in WA
Chen, W., Brennan, R., Anderson, G., Bell, R. and Bolland, M. (2011) Improving fertiliser management: redefining the relationship between soil tests and crop responses for wheat in WA. In: 2011 WA Agribusiness Crop Updates, 23 - 24 February, Perth, Western Australia.
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Most soils in Western Australia (WA) are highly weathered with very low levels of phosphorus. WA soils initially contained adequate indigenous soil potassium for cropping but removal of potassium over time in harvested grain has gradually resulted in the some soils becoming potassium-deficient for grain production.
Fertiliser costs represent a significant part of the variable costs of growing crops in WA. Chen et al. (2009) identified the need for updated soil test interpretations due to substantial changes in farming systems, fertiliser practices and crop yield potential. The aims of this study were (1) to compile experimental data containing the standard soil test measurements and observed wheat crop yield responses for both nil and fertilised treatments across different soil types and seasons from published or unpublished sources, and (2) to critically analyse soil test-crop response relationships to derive better critical soil test values in soils and environments suitable for wheat grain production in WA.
|Publication Type:||Conference Paper|
|Murdoch Affiliation:||School of Environmental Science|
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