Morawa trial - using Yield Prophet for tactical nitrogen responses


Research organisaton

Trial details

Researcher(s) Brad Hortin (CSBP)
Luigi Moreschi (CSBP)
Year(s) 2011
Contributor North East Farming Futures
Trial location(s) , WA
Morawa trial - using Yield Prophet for tactical nitrogen responses locations
  • The asses whether Yield Prophet could help make a better nitrogen fertiliser decision using yield potentials and available stored moisture.
  • To evaluate the effectiveness of various Flexi-N application strategies.
Key messages
  • The last application of nitrogen was applied on the 20th July. At this stage Yield Prophet indicated that to meet full potential an application of nitrogen was required. The plant available water (PAW) was 37mm at this time giving us approximately 30 days before the crop became moisture stressed. This gave us confidence to apply nitrogen knowing that the crop would continue to grow well for 30 days even without rain.
  • This site was very responsive to Flexi-N. Three applications (banded, Z13, and Z30) of 40 L/ha Flexi-N in creased yield from 1.8 t/ha to 3.2 t/ha. The nitrogen use efficiency from applied Flexi-N was 27 kg grain/kg N.
  • There were early responses to 85 kg/ha Agstar before N supply became limiting.
  • Plant tests in July indicated that molybdenum (Mo) was deficient (as low as 68 ug/kg with 85 kg/ha Agstar Extra), so 100 g/ha sodium molybdate was applied across the trial.
  • Grain protein was low (8 to 9%) due to yield dilution. Grain tests showed marginal sulphur (S) concentrations (average 0.10 mg/kg) which may have been detrimental to baking quality characteristics such as dough strength and extensibility.
Lead research organisation N/A
Host research organisation N/A
Related program N/A
  • Jason Jewell
  • CSBP research staff, Luigi Moreschi – CSBP, Brad Hortin – CSBP

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


Crop type Wheat
Treatment type(s)
  • Fertiliser: Type
  • Soil: Preparation
Trial type Experimental
Trial design Unknown


Sow date 17 May 2011
Harvest date 22 November 2011
Plot size Not specified
Plot replication Not specified
  • Z13 Flexi-N.
  • Z30 Flexi-N and 100 g/ha NaMo across the trial.

1.8 l/ha Treflan


300 ml Lorsban.

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Hectolitre weight (kg/hL) Screenings (%) Protein (%) Grain yield (t/ha)
1 No FN 78 3.4 8.5 1.42
2 No FN (banded) 78 2.8 8.8 1.83
3 40 FN L/ha (banded) 78 2.7 8 2.47
4 40 FN L/ha (banded) + 40 FN L/ha at Z13 78 3 8.8 2.9
5 40 FN L/ha (banded) + 40 FN L/ha at Z13 and Z30 78 30 8.9 3.2
6 28 FN L/ha (banded) 78 2.8 8.3 2.58
7 40 FN L/ha (banded) + 50 FN L/ha at Z13 and Z30 79 2.8 8.9 3.29

Grain yield t/ha


Hectolitre weight kg/hL


Protein %


Screenings %

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
, 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 WA
2011 319.8mm
2010 259.5mm
2009 278.0mm
2008 276.1mm
2007 227.0mm
2006 282.9mm
2005 275.0mm
2004 237.1mm
2003 249.7mm
2002 234.5mm
2001 265.7mm
2000 298.6mm
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



Derived climate information

No observed climate data available for this trial.
Derived climate data is determined from trial site location and national weather sources.



Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from
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: 25-06-2019 12:05pm AEST