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

2016 - 2018

Research organisaton
Funding source

Trial details

Researcher(s) Josh and Tony Goad (A.D, Goad), Jeremy Lemon (DPRID), Nathan Dovey (Stirling to Coast Farmers) and Joel Andrew (Map IQ)
Year(s) 2016 - 2018
Contributor agVivo
Trial location(s) Site 3, 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 Barley
Canola
Treatment type(s)
  • Soil
  • Soil: Preparation
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 Not specified
Harvest date Not specified
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 strength (kPa) Soil loosening depth (cm)
1 Rip_350mm 567 -5
2 Rip_350mm 1005 -10
3 Rip_350mm 1749 -15
4 Rip_350mm 1750 -20
5 Rip_350mm 1847 -25
6 Rip_350mm 2054 -30
7 Rip_350mm 2750 -35
8 Rip_350mm 2676 -40
9 Rip_350mm 2697 -45
10 Rip_350mm 2573 -50
11 Rip_350mm 2433 -55
12 Rip_350mm 2450 -60
13 Rip_350mm 2500 -65
14 Control 160 -5
15 Control 639 -10
16 Control 824 -15
17 Control 953 -20
18 Control 1164 -25
19 Control 1510 -30
20 Control 1746 -35
21 Control 1890 -40
22 Control 1874 -45
23 Control 1978 -50
24 Control 2452 -55
25 Control 2467 -60
26 Control 2370 -65
27 Control 2449 -70
28 Barrier 2500 -5
29 Barrier 2500 -10
30 Barrier 2500 -15
31 Barrier 2500 -20
32 Barrier 2500 -25
33 Barrier 2500 -30
34 Barrier 2500 -35
35 Barrier 2500 -40
36 Barrier 2500 -45
37 Barrier 2500 -50
38 Barrier 2500 -55
39 Barrier 2500 -60
40 Barrier 2500 -65
41 Barrier 2500 -70
42 Rip_700mm 466 -5
43 Rip_700mm 973 -10
44 Rip_700mm 1232 -15
45 Rip_700mm 1460 -20
46 Rip_700mm 1520 -25
47 Rip_700mm 1559 -30
48 Rip_700mm 1569 -35
49 Rip_700mm 1747 -40
50 Rip_700mm 1844 -45
51 Rip_700mm 1859 -50
52 Rip_700mm 1780 -55
53 Rip_700mm 1698 -60
54 Rip_700mm 1700 -65
55 Rip_700mm 1702 -70
56 Rip_1200mm 460 -5
57 Rip_1200mm 682 -10
58 Rip_1200mm 793 -15
59 Rip_1200mm 794 -20
60 Rip_1200mm 803 -25
61 Rip_1200mm 818 -30
62 Rip_1200mm 744 -35
63 Rip_1200mm 768 -40
64 Rip_1200mm 775 -45
65 Rip_1200mm 896 -50
66 Rip_1200mm 1032 -55
67 Rip_1200mm 1229 -60
68 Rip_1200mm 1229 -65
69 Rip_1200mm 1200 -70

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

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

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

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
Site 3, Kojaneerup, WA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 3, Kojaneerup, 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

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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.

Site 3, 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 last modified: 29-07-2019 17:43pm AEST