To investigate the impact of different stubble treatments imposed towards the end of the fallow have on nitrogen response (applied as urea) in wheat yield and quality.
To evaluate any interaction between pre-sowing stubble treatment and topdressing timing.
Key messages
The seasonal conditions experienced during these trials had a profound impact on the trial results.
During 2015 stubble treatments imposed late in fallow had no impact on N response.
Similar to 2014, during 2015 generally farmers were unable to predict final yield before sowing when the season experienced extreme weather conditions.
During 2015 split N applications did not improve yields and had only a very minor impact on grain quality.
During 2015 split N applications was not a way to reduce financial risk as opposed to all N fertiliser upfront since crop outlook at Z30 was positive.
Lead research organisation
Central West Farming Systems
Host research organisation
N/A
Trial funding source
GRDC CWF00018
Related program
Maintaining profitable farming systems with retained stubble
Acknowledgments
CWFS would like to acknowledge the support provided by the co-operating farmers; without their in-kind support the trials would not have been possible. The author also thanks Dr Neil Fettell for his support in compiling this report.
No observed climate data available for this trial. Derived climate data is
determined from trial site location and national weather sources.
Mumbil Creek NSW
Tottenham NSW
Weethalle NSW
Mumbil Creek NSW
NOTE: Exact trial site locality unknown - Climate data may not be accurate
Tottenham NSW
Weethalle NSW
NOTE: Exact trial site locality unknown - Climate data may not be accurate
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.
