To spray or to spread: quantifying UAN leaf uptake

2013

Research organisaton
Funding sources

Trial details

Researcher(s) Tim McClelland (BCG)
Rob Norton (IPNI)
Year(s) 2013
Contributor Birchip Cropping Group
Trial location(s) Watchupga East, VIC
To spray or to spread: quantifying UAN leaf uptake locations
Aims

To quantify nitrogen leaf uptake when applying UAN with and without follow-up rain; and to determine the effect of streaming versus standard nozzles on nitrogen leaf uptake.

Key messages
  • Soil applied fertiliser was and better than liquid urea or UAN applied with standard spray nozzles to the crops leaves.
  • Both urea and UAN are equally as effective when applied to the soil.
  • Growers should select the nitrogen product that most suits their farming system in terms of logistics and cost.
Lead research organisation N/A
Host research organisation N/A
Trial funding source IPNI
Trial funding source BCG members
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Type
  • Fertiliser: Method
Trial type Experimental
Trial design Replicated

Watchupga East 2013

Sow date 15 May 2013
Harvest date Not specified
Plot size 1.8m X 14m
Plot replication 4
Fertiliser

15 May - MAP + Zn (55kg/ha) 16 August - Liquid Urea, UAN, Urea (18kg/ha) (Based on treatments) 29 August - Liquid Urea, UAN, Urea (18kg/ha) (Based on treatments)

Herbicide

15 May - TriflurX (2L/ha) + Weedmaster Duo (2L/ha) + Avadex Xtra (2L/ha) 9 July - Velocity (670ml/ha) + Lontrel Advanced (50ml/ha) + Hasten (1%)

Insecticide

Fastac Duo (200ml/ha)

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

@T1: 4 DAA @T2: 10 DAA @T3: At anthesis
# Variety
Treatment 1
Treatment 2
Grain yield (t/ha) Accumulated grain N above the control (kg N/ha) Protein (%) Grain N yield (kgN/ha) N fertiliser efficiency (%) Plant N (kg N/ha) Plant N (kg N/ha) Plant N (kg N/ha)
1 Correll UAN Streaming Nozzles Follow-up Rain 1.76 6.5 8.7 25.3 36 30.5 30.5
1 Correll Urea Top-Dressed Follow-up Rain 1.69 8.4 8.5 27.2 47 26 29.9
1 Correll UAN Inter-row only Follow-up Rain 1.75 8.5 9.6 27.3 47 25.4 26.6
2 Correll UAN standard nozzles Follow-up Rain 1.6 4.9 8.6 23.7 27 25.4 24
2 Correll Liquid Urea Follow-up Rain 1.59 3.3 8.9 22 18 31.4 17.3
2 Correll UAN Streaming Nozzles No Follow-up Rain 1.5 6.5 9.1 25.3 36 23.2 30.5 30.5
3 Correll Urea Top-Dressed No Follow-up Rain 1.69 8.4 9.9 27.2 47 19.3 26 29.9
3 Correll UAN Inter-row only No Follow-up Rain 1.54 8.5 9.3 27.3 47 19.3 25.4 26.6
3 Correll UAN standard nozzles No Follow-up Rain 1.51 4.9 8.8 23.7 27 22.1 25.4 24
4 Correll Liquid Urea No Follow-up Rain 1.26 3.3 8.9 22 18 20.1 31.4 17.3
4 Correll
4 Correll
5 Correll
5 Correll
5 Correll
6 Correll
6 Correll
6 Correll
6 Correll
7 Correll
7 Correll
7 Correll
7 Correll
8 Correll
8 Correll
8 Correll
8 Correll
9 Correll
9 Correll
9 Correll
9 Correll
10 Correll
10 Correll
10 Correll
10 Correll

Grain yield t/ha


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Accumulated grain N above the control kg N/ha


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Grain N yield kgN/ha


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N fertiliser efficiency %


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Plant N kg N/ha


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Protein %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Watchupga East, VIC Sand, Clay
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Watchupga East, VIC 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 Watchupga East VIC
2013 512.9mm
2012 557.4mm
2011 596.9mm
2010 551.9mm
2009 493.6mm
2008 479.5mm
2007 519.3mm
2006 547.1mm
2005 592.9mm
2004 536.9mm
2003 542.5mm
2002 501.5mm
2001 552.0mm
2000 524.7mm
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.

Watchupga East VIC

CAUTION: Trial site locality unknown; Climate data sourced from Birchip Cropping Group office location
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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.