Slow release nitrogen trial

2013
CC BY 4.0

Research organisatons
Funding source

Trial details

Researcher(s) Darren Chitty (Landmark)
David Hurst (Landmark)
Year(s) 2013
Contributor West Midlands Group
Trial location(s) Regans Ford, WA
Slow release nitrogen trial locations
Aims

To assess the use of banded slow release nitrogen in comparison to banded urea and best practice farmer practice.

Key messages

The trial as a result of cockatoo damage experienced patchy emergence and has contributed to a higher LSD from the trial. While there is a larger LSD some conclusion can be drawn from the trial. It must also be noted that the price of the SRN has been assumed to be 1.5x greater than the cost of urea at $608/t. This assumption is only for comparison reasons only and is only an estimate.

This trial has demonstrated that SRN in leaching sands can be used as a banded product to  improve N efficiency and improve yields. From graph 1 the N efficiency of the applied nitrogen N applications has been calculated. As expected the banded urea had the poorest N efficiency ranging from between 1.6-<14%. SRN and urea mixes banded had an N efficiency improvement over the banded urea, with top-dressed urea at Z25 ranging from between 42 and 50% nitrogen efficiency.

SRN and top-dressed nitrogen had the best N efficiency ranging between 47 and 50%. In the WMG area this year the dry June while not welcome did help to improve N efficiency, with N efficiency >50% rarely heard of on the gravel matrix sand and deep sands in medium/high rainfall years. So while the area experienced a relatively low N leaching year the SRN has still enabled a greater $ROI/Ha for each plot.

Lead research organisation Landmark
Host research organisation West Midlands Group
Trial funding source Land and Water Australia
Related program N/A
Acknowledgments

Landmark would like to thank the following people for supply the trial site.

West Midlands Group

Peter Negus


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

Method

Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Fertiliser: Application Method
Trial type Experimental
Trial design Replicated

Regans Ford 2013

Sowing machinery

Knife point and press wheel.

Sow date 24 May 2013
Harvest date Not specified
Plot size 1.8m x 20m
Plot replication Not specified
Fertiliser

A Basal application was applied at seeding of Muriate of Potash top- dressed 70kg/Ha, Macropro Plus (Banded) 75kg/Ha and Super SR (Banded) 75kg/Ha.

This gave a basal application of nutrients that included:

7.5 kg/ha N, 17 kg/ha P, 41 kg/ha K and 13.5 kg/ha S

Herbicide

-       Farmer Knockdown prior to 24/05/2013

-       24/05/2013, Knockdown & Pre-em: Sakura 118g, Logran 35g, Treflan 2L/Ha, Sprayseed 2L/Ha.

-       28/06/2013, Crusader0.5L/Ha, Trojan 30ml/Ha.

-       04/07/2013, Z25 urea application.

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
Regans Ford, WA Yellow sands
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Regans Ford, WA Tenosol
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 Regans Ford WA
2013 151.9mm
2012 138.2mm
2011 136.9mm
2010 129.1mm
2009 142.1mm
2008 151.9mm
2007 107.9mm
2006 103.7mm
2005 142.2mm
2004 124.4mm
2003 142.9mm
2002 113.0mm
2001 115.0mm
2000 134.4mm
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

Loading

Climate

Regans Ford WA 2013


Observed climate information

Rainfall trial gsr (mm) 340mm

Derived climate information

Regans Ford WA

Loading
Loading
Loading

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

2013 trial report



Trial last modified: 23-07-2019 10:40am AEST