Revisiting gypsum for improved soil structure


Research organisaton
Funding source

Trial details

Researcher(s) Nadine Hollamby (Liebe Group)
Year(s) 2011
Contributor Liebe Group
Trial location(s) Site 8, Dalwallinu, WA
Revisiting gypsum for improved soil structure locations

To determine the efficacy and rate of gypsum required to improve soil structure on heavy clay soils in a minimum tillage system.

Key messages
Not specified
Lead research organisation Liebe Group
Host research organisation N/A
Trial funding source GRDC LIE00006
Related program N/A

Thank you to Ian Hyde for hosting and conducting the trial. The Liebe Groups involvement is funded by GRDC through LIE00006 ‘Improved stubble and soil management practices for sustainable farming systems in the Liebe area’. Stephen Davies from DAFWA in Geraldton for support and technical advice.

Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Soil amelioration: Rate
Trial type Experimental
Trial design Replicated

Dalwallinu 2011

Sow date 1 June 2011
Harvest date Not specified
Plot size 75m x 24m
Plot replication 3

1/6/11: 70 kg/ha K-Till Extra, 50 kg/ha Urea


1/6/11: 1 L/ha Glyphosate, 0.22 kg/ha Logran, 1.4 L/ha Trifluralin, 27/7/11: 600 mL/ha Velocity


1/6/11: 100 mL/ha Alpha Duo

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Establishment plants (plants/m2) Screenings (%) Protein (%) Grain yield (t/ha)
1 0 t/ha Gypsum 50 3.87 10.87 3.37
2 2 t/ha Gypsum 50 3.22 10.48 3.66
3 4 t/ha Gypsum 45 3.41 10.37 3.24

Grain yield t/ha


Establishment plants plants/m2


Protein %


Screenings %

Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Site 8, Dalwallinu, WA 0 - 10cm Loamy Clay
Site 8, Dalwallinu, WA 10 - 30cm Loamy Clay
Soil conditions
Trial site Soil texture
Site 8, Dalwallinu, WA Loamy clay
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 8, Dalwallinu, WA Kandosol
National soil grid Source
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



Site 8, Dalwallinu WA 2011

Observed climate information

Rainfall trial gsr (mm) 323mm

Derived climate information

Site 8, Dalwallinu WA


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

SILO weather estimates sourced from
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.

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