Joel Andrew (Map IQ) Fiona Hobley (Compass Agriculture)
Year(s)
2017 - 2018
Contributor
agVivo
Trial location(s)
Nyabing, WA
Aims
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
Acknowledgments
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
Trial results Table 1: 2017 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
Trial results Table 3: 2018 average crop yield for deep rip and control strips
#
Treatment 1
Grain yield (t/ha)
1
█
North Rip
3.59
2
█
North control
3.37
3
█
South Control 01
2.15
4
█
South Rip
2.72
5
█
South Control 02
2.34
Grain yield t/ha
Trial results Table 4
#
Treatment 1
Return on investment compared to control ($/ha)
Net 2-year benefit ($/ha)
Treatment Cost ($/ha)
Net 1-year benefit ($/ha)
1
█
Control
0
0
0
0
2
█
Deep Rip North
69
56
40
54
3
█
Deep Rip South
143
117
40
65
Net 1-year benefit $/ha
Net 2-year benefit $/ha
Return on investment compared to control $/ha
Treatment Cost $/ha
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.
Nyabing WA
NOTE: Exact trial site locality unknown - Climate data may not be accurate
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.
