The economics of summer weed spraying and effects on soil water and soil nitrogen for the Kwinana East RCSN Zone


Research organisaton
Funding source

Trial details

Researcher(s) N/A
Year(s) 2013
Contributor Southern DIRT
Trial location(s) Site 1, Merredin, WA
The economics of summer weed spraying and effects on soil water and soil nitrogen for the Kwinana East RCSN Zone locations

To demonstrate differences between sprayed and unsprayed plots from December 2012 to February 2013 for RCSN Kwinana East Port Zone trial locations.

Key messages

A harvest-time knockdown to kill summer weeds has been shown to conserve significant soil moisture prior to seeding in a series of trials across the eastern wheatbelt this year.

Lead research organisation Southern DIRT
Host research organisation N/A
Trial funding source GRDC SDI00015
Related program Regional Cropping Solutions Network
Acknowledgments N/A
Other trial partners Not specified


Crop type No crop specified
Treatment type(s)
  • Herbicide: Application
Trial type Article/commentary
Trial design Not applicable

Merredin 2013

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
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
Site 1, Merredin, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 1, Merredin, WA Sodosol
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 Site 1, Merredin WA
2013 334.1mm
2012 309.2mm
2011 274.5mm
2010 250.3mm
2009 281.9mm
2008 272.0mm
2007 246.8mm
2006 306.6mm
2005 274.8mm
2004 292.2mm
2003 295.6mm
2002 238.8mm
2001 286.1mm
2000 311.7mm
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



Derived climate information

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

Site 1, Merredin WA


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 report and links

No trial reports or attachments found

Trial last modified: 24-05-2019 11:35am AEST