Agronomic strategies for water repellant soils in WA - mouldboard ploughing, deep ripping and lime incorporation

CC BY 4.0

Research organisaton

Trial details

Researcher(s) Stephen Davies (DAFWA)
Chloe Turner (Facey Group)
Year(s) 2016
Contributor Facey Group
Trial location(s) Wickepin, WA
Agronomic strategies for water repellant soils in WA - mouldboard ploughing, deep ripping and lime incorporation locations

To determine if the addition of lime and its method of incorporation (mouldboard ploughing or deep ripping) has an effect on the soil pH profile, topsoil water repellence and crop productivity.

Key messages

As canola has the ability to compensate for bare areas by closing over the canopy, it is likely that if the trial area was planted to cereals, the variation between yields may have been greater. Over the first three seasons there have not been significant yield responses to the tillage treatments. Establishment on the mouldboard plough areas has been poor and this may be related to herbicide damage but weed control on the ploughed areas has been improved. Monitoring of this trial is ongoing, to see the impact of the treatments over time.

Lead research organisation Facey Group
Host research organisation N/A
Related program N/A

Craig Jespersen for hosting the trial site and Stephen Davies (DAFWA) for assisting in the planning and implementation of the trial. Support for this research was provided by DAFWA, Facey Group and GRDC through Project: DAW00244 “Delivering enhanced agronomic strategies for improved crop performance on water repellent soils in WA”.

Other trial partners DAFWA; GRDC
Download the trial report to view additional trial information


Crop type Oilseed: Canola
Treatment type(s)
  • Crop: Type
Trial type Experimental
Trial design Replicated

Wickepin 2016

Sow rate or Target density 2.8kg/ha
Sow date 30 April 2016
Harvest date Not specified
Plot size 5m x 120m
Plot replication 3

Vigour 100kg, MAXamFLO 80L, Urea 55kg, MOP 25kg


02/01/16 - Ester 680 500ml, Garlon 150ml, Glyphosate 800ml
01/03/16 - Ester 680 500ml, Garlon 100ml, Glyphosate 800ml
24/04/16 - Atrazine 1.1kg, Glyphosate 1.4L, Propyzamide 900WG 550gm
13/06/16 - Atrazine 1.1kg, Select 500ml


Bifenthrin 300EC 60ml, Chlorpyrifos 400ml


Flutriafol 500 200ml

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
Wickepin, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Wickepin, WA Sodosol
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 Wickepin WA
2016 186.7mm
2015 172.5mm
2014 171.7mm
2013 204.5mm
2012 218.7mm
2011 189.5mm
2010 175.9mm
2009 201.8mm
2008 200.3mm
2007 196.6mm
2006 211.1mm
2005 178.8mm
2004 158.7mm
2003 198.6mm
2002 154.2mm
2001 153.2mm
2000 257.8mm
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



Derived climate information

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

Wickepin WA

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

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.

Trial last modified: 22-05-2023 11:26am AEST