Yield response to ripping depth on a South Stirling sandplain. Kojaneerup, Western Australia

2016 - 2018
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Joel Andrew (Map IQ)
Nathan Dovey (Stirling to Coast Farmers)
Josh Goad (A.D)
Tony Goad (A.D)
Jeremy Lemon (DPRID)
Year(s) 2016 - 2018
Contributor agVivo
Trial location(s) Kojaneerup, WA
Yield response to ripping depth on a South Stirling sandplain. Kojaneerup, Western Australia locations
Aims

To assess the yield response to deep ripping depth on a productive sand plain near Kojaneerup, WA.

Key messages
  • Removing soil compaction increased barley yield by between 710kg/ha and 1,130kg/ha in 2016.
  • Very deep ripping (1200mm) gave the greatest yield increases at this site though there are factors that may inhibit the ability to rip this deep on a large scale.
Lead research organisation agVivo
Host research organisation N/A
Trial funding source GRDC AVP00003-A
Related program N/A
Acknowledgments

The research undertaken as part of this project is made possible by the significant contributions of Josh and Tony Goad who setup and hosted the trial with support from Jeremy Lemon of Department of Primary Industries and Regional Development and the GRDC. A further thank you to Jeremy Lemon for processing and access to the trial yield data. 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

Method

Crop types Cereal (Grain): Barley Oilseed: Canola
Treatment type(s)
  • Management systems: Soil engineering
  • Soil Preparation: Tillage
Trial type
Trial design

Kojaneerup 2016 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Kojaneerup 2016 Canola

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Kojaneerup 2017 Canola

Sow date Unknown
Harvest date Unknown
Plot size Not specified
Plot replication Not specified

Kojaneerup 2017 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Kojaneerup 2018 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified

Kojaneerup 2018 Canola

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Table 1: Average crop yield per treatment

# Treatment 1
Grain yield (t/ha)
1 Nil 5.8
2 Rip_350mm 5.9
3 Rip_700mm 6.54
4 Rip_1200mm 6.98

Grain yield t/ha


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Trial results Table 2: Average crop yield in 2017

# Treatment 1
Grain yield (t/ha)
1 Nil 1.76
2 Rip_350mm 1.75
3 Rip_700mm 1.76
4 Rip_1200mm 1.84

Grain yield t/ha


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Trial results Table 3: Average soil resistance for ripped and control plots

# Treatment 1
Soil loosening depth (cm) Soil strength (kPa)
1 Rip_350mm -5 567
2 Rip_350mm -10 1005
3 Rip_350mm -15 1749
4 Rip_350mm -20 1750
5 Rip_350mm -25 1847
6 Rip_350mm -30 2054
7 Rip_350mm -35 2750
8 Rip_350mm -40 2676
9 Rip_350mm -45 2697
10 Rip_350mm -50 2573
11 Rip_350mm -55 2433
12 Rip_350mm -60 2450
13 Rip_350mm -65 2500
14 Control -5 160
15 Control -10 639
16 Control -15 824
17 Control -20 953
18 Control -25 1164
19 Control -30 1510
20 Control -35 1746
21 Control -40 1890
22 Control -45 1874
23 Control -50 1978
24 Control -55 2452
25 Control -60 2467
26 Control -65 2370
27 Control -70 2449
28 Barrier -5 2500
29 Barrier -10 2500
30 Barrier -15 2500
31 Barrier -20 2500
32 Barrier -25 2500
33 Barrier -30 2500
34 Barrier -35 2500
35 Barrier -40 2500
36 Barrier -45 2500
37 Barrier -50 2500
38 Barrier -55 2500
39 Barrier -60 2500
40 Barrier -65 2500
41 Barrier -70 2500
42 Rip_700mm -5 466
43 Rip_700mm -10 973
44 Rip_700mm -15 1232
45 Rip_700mm -20 1460
46 Rip_700mm -25 1520
47 Rip_700mm -30 1559
48 Rip_700mm -35 1569
49 Rip_700mm -40 1747
50 Rip_700mm -45 1844
51 Rip_700mm -50 1859
52 Rip_700mm -55 1780
53 Rip_700mm -60 1698
54 Rip_700mm -65 1700
55 Rip_700mm -70 1702
56 Rip_1200mm -5 460
57 Rip_1200mm -10 682
58 Rip_1200mm -15 793
59 Rip_1200mm -20 794
60 Rip_1200mm -25 803
61 Rip_1200mm -30 818
62 Rip_1200mm -35 744
63 Rip_1200mm -40 768
64 Rip_1200mm -45 775
65 Rip_1200mm -50 896
66 Rip_1200mm -55 1032
67 Rip_1200mm -60 1229
68 Rip_1200mm -65 1229
69 Rip_1200mm -70 1200

Trial results Table 4: Bulk density of soil from each plot was calculated across the trial area.

# Treatment 1
10cm Bulk Density ((g/cm3)) 50cm Bulk Density (g/cm3) 30cm Bulk density (g/cm3) 20cm Bulk Density ((g/cm3))
1 Nil 1.01 1.63 1.43 1.53
2 Rip_350mm 0.96 1.55 1.32 1.37
3 Rip_700mm 0.92 1.55 1.42 1.38
4 Rip_1200mm 0.95 1.26 1.29 1.28

10cm Bulk Density (g/cm3)


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20cm Bulk Density (g/cm3)


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30cm Bulk density g/cm3


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50cm Bulk Density g/cm3


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Trial results Table 5: Economic return of each treatment show varied results across the ripping depths and seasons

# Treatment 1
Net 2-year benefit ($/ha) Treatment Cost ($/ha) Net 3-year benefit ($/ha) Net 1-year benefit ($/ha) Return on investment compared to control ($/ha)
1 Control   - 0 0 0
2 Rip 350mm -10 40 26 25 1
3 Rip 700mm 0 60 10 178 128
4 Rip 1200mm 35 200 -28 283 89

Net 1-year benefit $/ha


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Net 2-year benefit $/ha


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Net 3-year benefit $/ha


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Return on investment compared to control $/ha


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Treatment Cost $/ha


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Trial results Table 6: Average yield response by production zone

# Treatment 1
Treatment 2
Grain yield (t/ha)
1 Nil Low Production 3.39
2 Rip_350mm Low Production 4.06
3 Rip_700mm Low Production 3.73
4 Rip_1200mm Low Production 3.84
5 Nil High Production 5.68
6 Rip_350mm High Production 5.41
7 Rip_700mm High Production 5.48
8 Rip_1200mm High Production 5.38

Grain yield t/ha


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Kojaneerup, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Kojaneerup, WA Tenosol
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 Kojaneerup WA
2018 399.5mm
2017 430.6mm
2016 440.8mm
2015 403.4mm
2014 348.0mm
2013 409.1mm
2012 424.6mm
2011 430.3mm
2010 381.0mm
2009 418.4mm
2008 424.8mm
2007 365.2mm
2006 358.8mm
2005 406.0mm
2004 386.2mm
2003 418.7mm
2002 396.6mm
2001 361.2mm
2000 410.9mm
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

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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.

Kojaneerup WA

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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

Project Final Report

2017 trial report

2017 trial report



Trial last modified: 14-12-2022 15:12pm AEST