Nitrogen Use Efficiency Trial – influence of N rate (Kerang)

2019

Research organisatons
Funding source

Trial details

Researcher(s) Damian Jones
Ben Morris
Nick Poole
Tom Price
Michael Straight
Year(s) 2019
Contributor Field Applied Research (FAR) Australia
Trial location(s) Kerang, VIC
Nitrogen Use Efficiency Trial – influence of N rate (Kerang) locations
Aims

To evaluate nitrogen use efficiency in grain maize under different rates and of applied N fertiliser applied at sowing and at V6 as urea (46% N).

Key messages
  • The highest grain yield (machine harvested) achieved was 16.36 t/ha with the applied N rate of 240 kg N/ha in a crop producing 30.63 t/ha dry matter at 50.45% harvest index.
  • N applications above 240kg N/ha were uneconomic in the trial.
  • The nil control treatment yielded 10.89 t/ha in a crop producing 26t/ha dry matter at 51% harvest index.
  • Available Soil N prior to sowing and watering up was 34 kg N/ha (0-60cm). The nil control N offtake at harvest was 241 kg N/ha, suggesting in-crop mineralisation resulted in 207 kg N/ha of the N taken up.
  • At the highest level of N (560kg N/ha) there was no advantage to applying 80 Kg N/ha of the dose very late at tasselling.
Lead research organisation Field Applied Research (FAR) Australia
Host research organisation Irrigated Cropping Council
Trial funding source GRDC FAR1906-003RTX
Related program N/A
Acknowledgments N/A
Other trial partners Irrigated Cropping Council
Download the trial report to view additional trial information

Method

Crop type Cereal (Grain): Maize
Treatment type(s)
  • Fertiliser: Rate
  • Fertiliser: Timing
Trial type Experimental
Trial design Randomised,Replicated,Unreplicated

Kerang 2019

Sow date 29 October 2019
Harvest date 22 April 2020
Plot size Not specified
Plot replication Not specified
Fertiliser

Pre-sow pre drill N kg/h as urea (46% N):

Treatment 1: 0 
Treatment 2: 40
Treatment 3: 80
Treatment 4: 120
Treatment 5: 160
Treatment 6: 200
Treatment 7: 240
Treatment 8: 280

Post sow at Tasseling (VT) N kg/h as urea (46% N):

Treatment 1: 0 
Treatment 2: 40
Treatment 3: 80
Treatment 4: 120
Treatment 5: 160
Treatment 6: 200
Treatment 7: 240 + 80
Treatment 8: 280

Total N applies (kg N/ha):

Treatment 1: nill
Treatment 2: 80
Treatment 3: 160
Treatment 4: 240
Treatment 5: 320
Treatment 6: 400
Treatment 7: 480 + 80
Treatment 8:

Other trial notes

Previous crop: Grass dominant pasture (3 years)
Variety: Pioneer Hybrid 1756
Irrigation Type: Border check surface irrigation

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
Kerang, VIC Clay
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Kerang, VIC Vertosol
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 Kerang VIC
2019 297.0mm
2018 348.5mm
2017 400.1mm
2016 388.0mm
2015 370.5mm
2014 418.5mm
2013 443.6mm
2012 503.0mm
2011 565.1mm
2010 512.8mm
2009 402.3mm
2008 354.7mm
2007 325.4mm
2006 331.7mm
2005 366.3mm
2004 289.5mm
2003 283.3mm
2002 259.0mm
2001 330.6mm
2000 349.6mm
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

Derived climate information

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

Kerang VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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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

2019 trial report



Trial last modified: 17-03-2022 09:59am AEST