Assessing the yield response to deep ripping over multiple sites across a farm south of Nyabing, Western Australia


Research organisaton
Funding source

Trial details

Researcher(s) Ben and Fiona Hobley (Compass Agriculture) and Joel Andrew (Map IQ)
Year(s) 2017
Contributor agVivo
Trial location(s) Site 1, Nyabing, WA
Assessing the yield response to deep ripping over multiple sites across a farm south of Nyabing, Western Australia locations

To assess the impact of deep ripping on crop yield across varying sites on a farm near Nyabing, WA.

Key messages
  • Subsurface soil compaction has been shown to be a major constraint to crop production and its removal of this compaction via deep ripping can lead to large yield increases.
  • Assessing yield responses on different soil types will guide where future deep ripping work is carried out, with priority given to those soils with the greatest yield increases.
Lead research organisation agVivo
Host research organisation N/A
Trial funding source GRDC AVP00003-A
Related program N/A

The research undertaken as part of this project is made possible by the significant contributions of the Hobley family who setup the demonstration sites. This assessment of the trial and report is funded by the GRDC through the Albany Region Cropping Solution Network.
GRDC Project Number: AVP00003-A

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


Crop type None: Soil management
Treatment type(s)
  • Soil
  • Soil: Preparation
Trial type Demonstration
Trial design Unknown
Sow rate or Target density Not specified
Sowing machinery Not specified
Plot size Not specified
Plot replication Not specified
Plot blocking Not specified
Plot randomisation Not specified
Paddock history Not specified
Fertiliser Not specified
Herbicide Not specified
Insecticide Not specified
Fungicide Not specified
Pesticide Not specified
Soil amelioration Not specified
Seed treatment Not specified
Inoculant Not specified
Tillage Not specified
Other trial notes Not specified
Download the trial report to view additional method/treatment information

Trial results Table 1: Average Crop Yield for deep rip and adjacent strips.

# Treatment 1
Treatment 2
Grain yield (t/ha)
1 D06 North of Strip 2.151
2 D06 Rip Strip 2.31
3 D06 South of Strip 2.156
4 R09 - South North of Strip 2.35
5 R09 - South Rip Strip 2.65
6 R09 - South South of Strip 2.45
7 R09 - North North of Strip 2.35
8 R09 - North Rip Strip 2.425
9 R09 - North South of Strip 2.41
10 C01 - South North of Strip 2.88
11 C01 - South Rip Strip 3.05
12 C01 - South South of Strip 2.75
13 R07 North of Strip 2.3
14 R07 Rip Strip 2.85
15 R07 South of Strip 2.32
16 C01 - North North of Strip 3.15
17 C01 - North Rip Strip 3.15
18 C01 - North South of Strip 2.8

Grain yield t/ha


Trial results Table 2: Apparent yield benefit to ripping

# Treatment 1
Grain yield (t/ha)
1 D06 0.154
2 C01 North 0.179
3 C01 South 0.218
4 R09North 0.247
5 R09 South 0.044
6 R07 0.556

Grain yield t/ha

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 1, Nyabing, WA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 1, Nyabing, WA Sodosol
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 1, Nyabing WA 2017

Derived climate information
NOTE: Exact trial site locality unknown - Climate data may not be accurate
BOM Data source NYABING [2280] 0km proximity to trial site location


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 report and links

2017 trial report