Performance of DGT and Colwell P in predicting phosphorus responses in the Wimmera Mallee

2008

Research organisaton

Trial details

Researcher(s) Simon Craig (BCG)
Sean Mason (University of Adelaide)
Year(s) 2008
Contributor Birchip Cropping Group
Trial location(s) Birchip, VIC
Boolite, VIC
Charlton, VIC
Curyo, VIC
Hopetoun, VIC
Jil JIl, VIC
Kinnabulla, VIC
Kooloonong, VIC
Nullawil, VIC
Rupanyup, VIC
St Arnaud, VIC
Warracknabeal, VIC
Performance of DGT and Colwell P in predicting phosphorus responses in the Wimmera Mallee locations
Aims

To compare two soil phosphorus (P) tests (Diffusive Gradient Thin Films (DGT) and Colwell P) for their prediction of crop responses to applied-P in farmer paddocks.

Key messages
  • Starter application of P was important in maximising yields at GS30.
  • Grain yield responses (< 90 percent relative yield) to P were obtained for 35 percent of the paddocks surveyed.
  • DGT accurately predicted wheat responses to P accounting for 64 percent and 79 percent of the variation in early dry matter and grain respectively.
  • Colwell P could only explain 36 percent of the variation in early dry matter and no significant relationship could be obtained with grain.
  • Colwell P plus the Phosphorus Buffering Index (PBI) correctly predicted wheat response in 60 percent of the sites.
Lead research organisation N/A
Host research organisation N/A
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop types Cereal (Grain): Barley Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Timing
  • Soil Properties: Type
Trial type
Trial design

Birchip 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Birchip 2008 Wheat

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Boolite 2008 Barley

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Boolite 2008 Wheat

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Charlton 2008 Barley

Sow date Not specified
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Charlton 2008 Wheat

Sow date Not specified
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Curyo 2008 Barley

Sow date Not specified
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Curyo 2008 Wheat

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Hopetoun 2008 Barley

Sow date Not specified
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Hopetoun 2008 Wheat

Sow date Not specified
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Jil JIl 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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Jil JIl 2008 Wheat

Sow date Not specified
Harvest date Not specified
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Kinnabulla 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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Kinnabulla 2008 Wheat

Sow date Not specified
Harvest date Not specified
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Kooloonong 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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Kooloonong 2008 Wheat

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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Nullawil 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Nullawil 2008 Wheat

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Rupanyup 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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Rupanyup 2008 Wheat

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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St Arnaud 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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St Arnaud 2008 Wheat

Sow date Not specified
Harvest date Not specified
Plot size Not specified
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Warracknabeal 2008 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Warracknabeal 2008 Wheat

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Birchip, VIC Not specified
Boolite, VIC Not specified
Charlton, VIC Not specified
Curyo, VIC Not specified
Hopetoun, VIC Not specified
Jil JIl, VIC Not specified
Kinnabulla, VIC Not specified
Kooloonong, VIC Not specified
Nullawil, VIC Not specified
Rupanyup, VIC Not specified
St Arnaud, VIC Not specified
Warracknabeal, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Birchip, VIC Vertosol
Boolite, VIC Calcarosol
Charlton, VIC Sodosol
Curyo, VIC Calcarosol
Hopetoun, VIC Tenosol
Jil JIl, VIC Calcarosol
Kinnabulla, VIC Calcarosol
Kooloonong, VIC Vertosol
Nullawil, VIC Calcarosol
Rupanyup, VIC Vertosol
St Arnaud, VIC Chromosol
Warracknabeal, VIC Vertosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Birchip VIC Boolite VIC Charlton VIC Curyo VIC Hopetoun VIC Jil JIl VIC Kinnabulla VIC Kooloonong VIC Nullawil VIC Rupanyup VIC St Arnaud VIC Warracknabeal VIC
2008 275.5mm815.4mm590.8mm647.7mm454.1mm802.1mm628.9mm391.8mm687.7mm275.5mm437.0mm663.2mm
2007 274.8mm819.5mm577.6mm680.3mm455.4mm809.8mm627.8mm406.5mm669.3mm274.8mm436.5mm679.7mm
2006 283.6mm829.5mm579.5mm682.6mm441.2mm814.0mm634.8mm426.2mm711.6mm283.6mm424.4mm669.8mm
2005 316.0mm824.5mm592.2mm715.6mm483.1mm848.9mm667.7mm451.3mm759.1mm316.0mm453.6mm689.9mm
2004 281.0mm767.4mm556.2mm679.0mm436.8mm795.2mm622.5mm408.8mm728.4mm281.0mm436.5mm621.6mm
2003 275.8mm782.3mm550.3mm696.5mm429.3mm821.3mm600.6mm406.3mm719.8mm275.8mm445.8mm618.3mm
2002 240.1mm699.8mm508.1mm654.5mm387.1mm792.0mm545.9mm389.0mm620.6mm240.1mm405.6mm547.5mm
2001 285.1mm728.2mm535.4mm675.2mm445.0mm801.4mm589.6mm444.8mm606.2mm285.1mm437.2mm559.2mm
2000 290.6mm696.4mm492.8mm649.0mm453.4mm744.9mm557.2mm412.2mm586.8mm290.6mm402.9mm545.7mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

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Climate

Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.

Birchip VIC

Boolite VIC

Charlton VIC

Curyo VIC

Hopetoun VIC

Jil JIl VIC

Kinnabulla VIC

Kooloonong VIC

Nullawil VIC

Rupanyup VIC

St Arnaud VIC

Warracknabeal VIC

Birchip VIC

CAUTION: Trial site locality unknown; Climate data sourced from Birchip Cropping Group office location
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Boolite VIC

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Charlton VIC

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Curyo VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Hopetoun VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Jil JIl VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Kinnabulla VIC

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Kooloonong VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Nullawil VIC

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Rupanyup VIC

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St Arnaud VIC

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Warracknabeal VIC

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Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.

Trial report and links

2008 trial report



Trial last modified: 25-11-2019 10:27am AEST