Early post emergent (EPE) deep ripping

2021
CC BY 4.0

Research organisation
Funding source

Trial details

Researcher(s) Dylan Hirsch
Contact email Chris@liebegroup.org.au
Year(s) 2021
Contributor Liebe Group
Trial location(s) Latham, WA
Further information View external link
Early post emergent (EPE) deep ripping locations
Aims

To demonstrate and quantify the plant establishment penalty of seeding canola into deep ripped soil, the loss of plants by deep ripping early post emergent (EPE), and to check if delaying deep ripping until EPE still produces a yield boost compared to ripping in typical summer conditions.

Key messages

• There was no yield benefit to early post emergent ripping at 1, 3, or 6 weeks following seeding.

• Plant establishment and grain yield was reduced when ripped 1 week after sowing.

Lead research organisation Liebe Group
Host research organisation N/A
Trial funding source GRDC WMG1803-002SAX
Related program N/A
Acknowledgments

This project (WMG1803-002SAX) is a GRDC investment that is led by the West Midlands Group and this site is managed by the Liebe Group. This site is one of four trial sites across the Wheatbelt that has investigated the use of early post emergent (EPE) deep ripping on grain yield. Thank you to the Hirsch family for hosting the trial site.


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

Method

Crop type Oilseed: Canola
Treatment type(s)
  • Engineering : Tillage
  • Soil Improvement : Timing
Trial type Experimental
Trial design Replicated

Latham 2021

Sow rate or Target density 1.4 kg/ha
Sow date 20 April 2021
Harvest date 4 November 2021
Plot size 200m x 18.3m
Plot replication 2
Fertiliser

15/03/2021 - 80 kg/ha MOP, 80 kg/ha Superphosphate
14/05/2021 - 45 L/ha U AN
05/06/2021 - 65 L/ha UAN

Herbicide

14/05/2021 - 1.2 L/ha Glyphosate 450
05/07/2021 - 1.2 L/ha Glyphosate 450
18/09/2021 - 1.5 L/ha Glyphosate 450

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
Latham, WA Sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Latham, WA Tenosol

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.

Latham WA

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

2021 trial report



Trial last modified: 11-07-2025 15:21pm AEST