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https://hdl.handle.net/2440/64266
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DC Field | Value | Language |
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dc.contributor.author | Mason, S. | - |
dc.contributor.author | McNeill, A. | - |
dc.contributor.author | McLaughlin, M. | - |
dc.date.issued | 2010 | - |
dc.identifier.citation | Proceedings of the 15th Australian Agronomy Conference (AAC): Food Security from Sustainable Agriculture / H. Dove and R. A. Culvenor (eds.), 15-18 November, 2010; pp.1-4 | - |
dc.identifier.uri | http://hdl.handle.net/2440/64266 | - |
dc.description.abstract | The DGT soil test for assessing plant-available phosphorus (P) in soil has now been calibrated over three growing seasons using field-based P response trials across a range of crops (wheat, barley, canola and peas). Regression analysis of relative early dry matter production and grain yield responses demonstrated that the DGT method predicted wheat responsiveness to applied P more accurately than Colwell P and resin P. Using regression the DGT method explained 75 % of the variation in response for early dry matter and 74 % for grain. No other significant regression relationships were obtained for the other soil tests, apart from resin P which explained 40 % of the variation in response for grain. The performance of the Colwell-P test was assessed after modification using the phosphorus buffering index (PBI) and correctly predicted the crop response to P for 17 of the 30 experiments, compared to 20/30 for resin P and 26/31 for DGT. These observations suggest that the DGT technique can assess plant available P in soils with significantly greater accuracy than traditional soil P testing methods. Phosphorus response trials with other crop types including barley, canola, field peas and chickpeas have shown that different crop types have varying abilities to utilise residual P in the soil. Importantly DGT has consistently been the most accurate method for predicting P response for each of these crop types. | - |
dc.description.statementofresponsibility | Sean Mason, Ann McNeill and Mike J. McLaughlin | - |
dc.language.iso | en | - |
dc.publisher | ASA | - |
dc.rights | © 2010 Australian Society of Agronomy. All Rights Reserved | - |
dc.source.uri | http://www.regional.org.au/au/asa/2010/crop-production/nitrogen-phosphorus/7166_masonsd.htm | - |
dc.subject | Nutrient availability | - |
dc.subject | phosphorus deficiency | - |
dc.subject | soil testing | - |
dc.subject | soil fertility | - |
dc.title | Expanding the use of diffusive gradients in thin-films (DGT) for assessing phosphorus requirements of different crop types | - |
dc.type | Conference paper | - |
dc.contributor.conference | Australian Agronomy Conference (15th : 2010 : Lincoln, New Zealand) | - |
dc.publisher.place | Australia | - |
pubs.publication-status | Published | - |
dc.identifier.orcid | McNeill, A. [0000-0002-6060-4661] | - |
dc.identifier.orcid | McLaughlin, M. [0000-0001-6796-4144] | - |
Appears in Collections: | Agriculture, Food and Wine publications Aurora harvest 5 Environment Institute publications |
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