Controlled traffic impacts on vetch production

2017

Research organisaton
Funding source

Trial details

Aims

To focus on the impact of trafficking by heavy vehicles on crop production and soil condition, as well as monitoring how quickly LRZ soils will "self-repair" if heavy trafficking is stopped. Issues of implementing CTF and managing permanent wheel tracks are being addressed in other components of the project.

Key messages
  • Vetch production in a very tough season was little affected by trafficking imposed in 2015.
  • After three years of crop production, low levels of trafficking have had little impact on grain yield on a Minnipa soil, multiple trafficking on wet soil (in 2015) increased grain yields in the second and third crops.
  • Ripping conducted in 2015 lifted the soil substantially but has not benefited production in any of the following three crops.
Lead research organisation SARDI Minnipa Agricultural Centre
Host research organisation N/A
Trial funding source GRDC ACT00004
Related program N/A
Acknowledgments

Thanks to MAC farm staff for the implementation and management of the R site and to Ian Richter, Brett Hay and Naomi Scholz for undertaking the monitoring of crop performance and soil condition.


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

Method

Crop type Hay: Vetch
Treatment type(s)
  • Crop: Type
  • Soil Properties: Compaction
  • Soil Improvement: Application Method
Trial type Experimental
Trial design Replicated

Minnipa Agricultural Centre 2017

Sow rate or Target density 50 kg/ha
Sowing machinery

The R trials were designed and implemented to be teh same at all four sites. Each trial consisted of 5 treatments replicated 4 times:

  1. Control (no heavy vehicle trafficking).
  2. One pass of a 30 tonne vehicle prior to seeding when soil was dry.
  3. One pass of a 20 tonne vehicle prior to seeding when soil was wet.
  4. Three passes of a 20 tonne vehicle prior to seeding when soil was wet.
  5. Deep ripping (to loosen any historical trafficking).
Sow date 26 April 2017
Harvest date Not specified
Plot size 50m X 3m
Plot replication 4
Fertiliser

50 kg/ha DAP

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Grain yield (kg/ha) Hay biomass (kg/ha) Depth of seeding (mm) Maturity biomass ((kg shoots/ha)) Establishment plants (plants/m2)
1 Control 320 1376 65 664 62
2 Single trafficking on dry soil 306 1242 64 662 46
3 Single trafficking on wet soil 372 1796 50 744 50
4 Multi trafficking on wet soil 416 1938 47 843 51
5 Ripping 333 1090 76 670 43
6 LSD (P=0.05) ns 10 ns ns

Depth of seeding mm


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Establishment plants plants/m2


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Grain yield kg/ha


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Hay biomass kg/ha


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Maturity biomass (kg shoots/ha)


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Minnipa Agricultural Centre, SA Calcareous red sandy loam
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa Agricultural Centre, SA Calcarosol
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 Minnipa Agricultural Centre SA
2017 437.2mm
2016 409.0mm
2015 381.0mm
2014 439.7mm
2013 385.5mm
2012 407.7mm
2011 453.8mm
2010 454.3mm
2009 466.5mm
2008 380.6mm
2007 367.6mm
2006 384.7mm
2005 350.4mm
2004 343.8mm
2003 348.6mm
2002 343.5mm
2001 396.8mm
2000 422.6mm
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

Minnipa Agricultural Centre SA 2017


Observed climate information

Rainfall avg ann (mm) 325mm
Rainfall avg gsr (mm) 241mm
Rainfall trial total (mm) 282mm
Rainfall trial gsr (mm) 155mm

Derived climate information

Minnipa Agricultural Centre SA

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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: 03-09-2019 15:49pm AEST