Understanding the impact of soil mineral nitrogen on disease suppression

2009

Research organisaton
Funding source

Trial details

Researcher(s) Amanda Cook (SARDI)
Wade Shepperd (SARDI)
Nigel Wilhelm (SARDI)
Year(s) 2009
Contributor SARDI Minnipa Agricultural Centre
Trial location(s) Minnipa, SA
Understanding the impact of soil mineral nitrogen on disease suppression locations
Aims

To understand the impact of soil carbon and nitrogen cycling on disease suppression.

Key messages
  • Vigorous growth in all crops and pasture treatments in 2009 has set up the trial for 2010, when the impact of soil mineral N on disease suppression will be assessed.
  • At the start of the 2009 season there were already small differences in mineral nitrogen levels in the soil profile, spray topped medic having the highest with 63 kg N/ha and the control wheat the least with 44 kg N/ha.
  • Since healthy medic will fix around 25 kg N/t DM, the medic spray topped treatment should have fixed around 125 kg N/ha during 2009.
  • There were slight changes in Rhizoctonia inoculum in some treatments early this season but there were no visual differences in Rhizoctonia patches in the cereal plots in 2009.
Lead research organisation SARDI Minnipa Agricultural Centre
Host research organisation N/A
Trial funding source SAGIT
Related program Eyre Peninsula Farming Systems
Acknowledgments

Thank you to SAGIT for funding this project.


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

Method

Crop types Cereal (Grain): Wheat Pasture: Medic Grain Legume: Field peas
Treatment type(s)
  • Crop: Type
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Replicated

Minnipa 2009 Wheat

Sow date 5 May 2009
Harvest date Not specified
Plot size 40m x 1.5m
Plot replication 4
Fertiliser

two nitrogen fertilisers, urea at 60 kg/ha and sulphate of ammonia at 120 kg/ha (split applications; half at seeding and other applied on 27 July),

Herbicide

1 L/ ha Roundup, 1 L/ha Treflan and 80 ml of Hammer used pre-seeding.

Minnipa 2009 Medic

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

Minnipa 2009 Field peas

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Herbicide Not specified
Download the trial report to view additional method/treatment information
Trial source data and summary not available
Check the trial report PDF for trial results.
Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Minnipa, SA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Minnipa, 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 SA
2009 391.3mm
2008 330.4mm
2007 331.2mm
2006 334.5mm
2005 288.0mm
2004 296.1mm
2003 293.2mm
2002 283.3mm
2001 343.9mm
2000 389.0mm
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 SA 2009


Observed climate information

Rainfall avg ann (mm) 325mm
Rainfall avg gsr (mm) 242mm
Rainfall trial total (mm) 421mm
Rainfall trial gsr (mm) 333mm

Derived climate information

Minnipa 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 report and links

2009 trial report



Trial last modified: 08-10-2019 15:00pm AEST