Sodic soil amelioration using lime and gypsum - 5 years of results at Gunning Gap

2001 - 2005
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Ken Motley (NSW DPI)
Andrew Rice (Ivey ATP)
Year(s) 2001 - 2005
Contributor Central West Farming Systems
Trial location(s) Gunning Gap, NSW
Sodic soil amelioration using lime and gypsum - 5 years of results at Gunning Gap locations
Aims

To demonstrate the production and associated economic benefits from ameliorating soil sodicity over the long term.

Key messages
  • The application of lime and gypsum to a sodic soil has improved soil structure (observations) and fertility (soil test results) in the top soil (0-10cm). However, despite the lime and gypsum being applied 5 years ago, soil tests indicate there has been no change in the sub soil (10-30cm).
  • Gypsum produced a greater soil ameliorant effect in the early years, but after 5 years appears to have largely 'run out of puff. In contrast, lime produced smaller benefits in the early years, but it's effects have lasted longer and are still clearly visible after 6 years.
Lead research organisation Central West Farming Systems
Host research organisation N/A
Trial funding source GRDC
Related program N/A
Acknowledgments

These trials were conducted as part of the CWFS Regional Site program. The trial sites were supported by the GRDC. Greg Gibson (NSW DPI), Sharon Taylor (CWFS) and Alan LeStrange (CWFS) provided invaluable technical assistance. The data was analysed by Helen Nicol (Consulting Statistician). Thanks go to Mark Judson (trial cooperator) for his cooperation over the last 5 years.


Other trial partners NSW DPI
Download the trial report to view additional trial information

Method

Crop type Barley
Treatment type(s)
  • Soil
  • Soil amelioration
Trial type
Trial design

Gunning Gap 2001

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

Gunning Gap 2002

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

Gunning Gap 2003

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

Gunning Gap 2004

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

Gunning Gap 2005

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

Download results

Trial results Table 1

# Treatment 1
Screenings (%) Grain yield (t/ha) Protein (%)
1 Nil 3 2.51 10.3
2 2.0-Lime 3.1 3.16 10.9
3 Albrecht plot 3.6 3.52 11.2
4 6.0-Lime 4.5 3.26 11.8
5 8.0-Lime 4.5 3.27 11.8
6 4.0 - Gypsum 3.3 2.88 10.5

Grain yield t/ha


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Protein %


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Screenings %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Gunning Gap, NSW Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Gunning Gap, NSW Chromosol
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 Gunning Gap NSW
2005 568.4mm
2004 550.6mm
2003 538.5mm
2002 486.0mm
2001 498.5mm
2000 511.8mm
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.

Gunning Gap NSW

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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 last modified: 28-08-2019 11:59am AEST