Deep ripping, deeper deep ripping and water use efficiency


Research organisatons
Funding source

Trial details


Growers and advisers have a better understanding of the benefits of deep ripping and in particular depth of deep ripping required to optimise crop yield & profit. They also better understand where the cost is worthwhile (rainfall zones, soil types) and very importantly how long the benefit lasts for in a CTF system.

Growers and advisers will be able to assess the likely cost-benefit to them/their clients of deep ripping.

Key messages


  • Ripping below the hard pan (greater than 500mm) in pale sands, yellow sands and yellow loams in wheat or canola increases yield.
  • Soil moisture probes show ripping deeper (below 500mm) allows more plant roots to access moisture deeper in the profile for longer in the season. Water infiltration also increase with depth of ripping.
  • Leaving a firm even seed bed after deeper ripping is important to reduce seeding establishment issues.
  • A negative yield response to deeper ripping in lupins on yellow sand was measured at Binnu in 2016.
  • Crop yield response to ripping does vary depending on seasonal conditions and crop type therefore the economics of ripping must be considered over multiple seasons and timing of ripping in the rotation.
Lead research organisation Grains Research and Development Corporation
Host research organisation Agrarian Management
Trial funding source GRDC GER9
Related program Regional Cropping Solutions Network

Thank you very much to the host farmers Ben Cripps, Paul Messina, Spring Park Farms, Matt Freeman and Braden Bagley.

Thank you to DAFWA GRDC funded project DAW00243 for providing advice on trial setup, assistance with soil compaction assessments and result interpretation.

Thanks to Richard Riddle, Data into Profit for data analysis via crop manager.

Other trial partners Precision Agriculture
Download the trial report to view additional trial information


Crop type Wheat
Treatment type(s)
  • Soil: Compaction
  • Soil amelioration
Trial type Experimental
Trial design Unknown

Mullewa 2016

Sow rate or Target density 60kg/ha
Sowing machinery

controlled traffic farming system 3:1 ratio  40ft header, 60ft seeder, 120ft sprayer 36.4, 6.05m ripper

Sow date 4 May 2016
Harvest date Not specified
Plot size 36m x 500m
Plot replication Not specified
Soil amelioration
  • Ripped 550mm (control)
  • Ripped 300mm
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
Site 7, Mullewa, WA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 7, Mullewa, WA Tenosol
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 7, Mullewa WA 2016

Observed climate information

Rainfall trial gsr (mm) 242mm

Derived climate information

Site 7, Mullewa 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.

Individual Trial Project data and information and OFT metadata are licensed under a Creative Commons Attribution 4.0 International License.
The data and information accessed through OFT may also be subject to Terms of Use specified by the Trial Contributor,
in which case the Terms of Use of a Trial Contributor take precedence over other information provided on OFT.
Trial last modified: 31-05-2019 11:16am AEST