In-season nitrogen on wheat on paddock management zones - West Maya

2005
CC BY 4.0

Research organisatons

Trial details

Researcher(s) Michael Robertson (CSIRO)
Kathy Wittwer (CSIRO)
Year(s) 2005
Contributor Liebe Group
Trial location(s) West Maya, WA
In-season nitrogen on wheat on paddock management zones - West Maya locations
Aims

To evaluate the response of wheat (yield and protein) in different paddock management zones to in-season application of nitrogen fertiliser, using the Yield Prophet system as a guide.

Key messages
  • Yield differences between soil types were less than seen in previous seasons on this paddock, although they did yield in expected order.
  • Starting nitrogen levels were quite high (>100kg N/ha) due to previous crop history.
  • Overall with the better responses to applied N being achieved on the better soils or where there was plenty of starting soil nitrogen, this experiment has given encouragement to the idea of managing soil types (or management zones) differentially for N.
Lead research organisation Commonwealth Scientific and Industrial Research Organisation
Host research organisation N/A
Related program N/A
Acknowledgments

Thanks to Brian McAlpine, Brianna Peake for assistance with Yield Prophet simulations, CBH for grain analysis, GRDC for funding through the SIP09 Precision Agriculture Initiative. 


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

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Rate
  • Fertiliser: Timing
  • Soil Properties: Type
Trial type Experimental
Trial design Replicated

West Maya 2005

Sow date 18 May 2005
Harvest date Not specified
Plot size 40m x 10m
Plot replication 4
Fertiliser

Basal fertiliser: 100 kg/ha of K-Till extra (10 kgN/ha) applied to entire paddock at seeding. At each sampling position 3 fertiliser treatments were applied

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Treatment 2
Protein (%) Grain yield (t/ha) Screenings (%) Gross margin ($/ha)
1 Good Sand 10 kg/ha Total Applied N 7 2.3 5.2 303
2 Gravel 10 kg/ha Total Applied N 8.4 2.7 3 377
3 Medium Sand 10 kg/ha Total Applied N 7.7 2.5 4 340
4 Poor Sand 10 kg/ha Total Applied N 9.1 2.8 5.8 398
5 Red Clay 10 kg/ha Total Applied N 9.7 3.6 4 554
6 Good Sand 31 kg/ha Total Applied N 7.2 2.9 4 387
7 Gravel 31 kg/ha Total Applied N 8.7 2.8 3 367
8 Medium Sand 31 kg/ha Total Applied N 7.9 2.8 2.1 375
9 Poor Sand 31 kg/ha Total Applied N 9.6 2.7 2.1 365
10 Red Clay 31 kg/ha Total Applied N 7.9 2.9 1.4 413
11 Good Sand 48 kg/ha Total Applied N 7.5 3 4.9 396
12 Gravel 48 kg/ha Total Applied N 9.9 2.7 3.2 328
13 Medium Sand 48 kg/ha Total Applied N 8.5 2.9 3.3 367
14 Poor Sand 48 kg/ha Total Applied N 11.1 2.1 5.5 229
15 Red Clay 48 kg/ha Total Applied N 9.5 3.4 4.2 474

Grain yield t/ha


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Gross margin $/ha


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Protein %


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Screenings %


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Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
West Maya, WA 0 - 10cm Various
West Maya, WA 10 - 30cm Various
Soil conditions
Trial site Soil texture
West Maya, WA Various
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
West Maya, WA Kandosol
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 West Maya WA
2005 168.1mm
2004 173.9mm
2003 190.2mm
2002 145.9mm
2001 154.8mm
2000 242.2mm
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

West Maya WA 2005


Observed climate information

Rainfall trial gsr (mm) 298.5mm

Derived climate information

West Maya 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 report and links

2005 trial report