Variable rate technology evaluation

2011
CC BY 4.0

Research organisaton
Funding source

Trial details

Researcher(s) Nicole Dimos (SPAA)
Linden Masters (FSG)
Brett McEvoy (Farm Hand)
Peter Treloar (Trials coordinator)
Year(s) 2011
Contributor Society of Precision Agriculture Australia
Trial location(s) Minnipa, SA
Variable rate technology evaluation locations
Aims
  • To compare the effects on using variable fertiliser rates at seeding in four production zones based on yield maps, EM maps and combining both.
  • To determine if EM38 mapping adds value to yield mapping in the preparation of a VRT fertiliser strategy?
Key messages

On upper Eyre Peninsula few people use EM38 mapping to support the use of VRT. Currently yield maps and paddock knowledge are the most commonly used methods for determining production zones within paddocks. The demonstrations show that increasing fertiliser rates did not have an effect on yields but yields did follow EM38 mapped soil zones.

Lead research organisation Society of Precision Agriculture Australia
Host research organisation N/A
Trial funding source GRDC SPA000010
Related program N/A
Acknowledgments

This project was funded by the Grains Research and Development Corporation (GRDC) and run in conjunction with Eyre Peninsula Agricultural Research Foundation, SARDI Minnipa Agricultural Centre, Eyre Peninsula Natural Resources Management Board and the Eyre Peninsula Farming Systems 3 project


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

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Rate
Trial type Precision agriculture
Trial design Not applicable

Minnipa 2011

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

18:20 DAP @ 30, 45, 50, 58, 60, 70, 75, 80kg/ha. Urea @0, 20, 30, 40kg/ha.

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Download results

Trial results Table 1

# Treatment 1
Grain yield (t/ha)
1 Demonstration 1 - Zone 1: VR P @ 50kg/ha 2.21
2 Demonstration 1 - Zone 1: flat rate P @ 58kg/ha 2.04
3 Demonstration 1 - Zone 2: VR P @ 60kg/ha 2.35
4 Demonstration 1 - Zone 2: flat rate P @ 58kg/ha 2.15
5 Demonstration 1 - Zone 3: VR P @ 70kg/ha 2.47
6 Demonstration 1 - Zone 3: flat rate P @ 58kg/ha 2.41
7 Demonstration 1 - Zone 4: VR P @ 80kg/ha 2.63
8 Demonstration 1 - Zone 4: flat rate P @ 58kg/ha 2.53
9 Demonstration 2 - Zone 1: VR P @ 75kg/ha 2.28
10 Demonstration 2 - Zone 1: flat rate P @ 58kg/ha 2.28
11 Demonstration 2 - Zone 2: VR P @ 60kg/ha 2.33
12 Demonstration 2 - Zone 2: flat rate P @ 58kg/ha 2.22
13 Demonstration 2 - Zone 3: VR P @ 45kg/ha 2.08
14 Demonstration 2 - Zone 3: flat rate P @ 58kg/ha 1.94
15 Demonstration 2 - Zone 4: VR P @ 30kg/ha 1.81
16 Demonstration 2 - Zone 4: flat rate P @ 58kg/ha 1.86
17 Demonstration 3 - Urea @ 0 kg/ha 1.7
18 Demonstration 3 - Urea @ 20kg/ha 1.69
19 Demonstration 3 - Urea @ 30kg/ha 1.65
20 Demonstration 3 - Urea @ 40kg/ha 1.55

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
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
2011 261.1mm
2010 245.0mm
2009 274.3mm
2008 206.4mm
2007 206.7mm
2006 238.5mm
2005 214.7mm
2004 205.7mm
2003 208.3mm
2002 198.4mm
2001 242.7mm
2000 252.4mm
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 2011


Observed climate information

Rainfall trial gsr (mm) 252mm

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 last modified: 30-09-2019 16:16pm AEST