Potassium * lime

CC BY 4.0

Research organisatons

Trial details

Researcher(s) N/A
Year(s) 2016
Contributor West Midlands Group
Trial location(s) Bolgart, WA
Potassium * lime locations

To investigate potassium and lime responses and effects on lime and potassium requirements.

Key messages

Barley yields exceeded 5 t/ha with strong responses to lime and potassium fertiliser.

The 1.0 t/ha response to potassium (K) was not as strong as in the previous two wheat crops (1.4 t/ha in 2013 and 2.4 t/ha in 2014). This was probably partly due to better control of ryegrass in plots without K fertiliser compared to previous years.

The response to lime applied in 2011 and 2014 was also 1.0 t/ha. This followed a 0.35 t/ha response in 2014 wheat. Like 2014, lime did not affect response to K.

Compared to topdressing potash, banding K increased early crop vigour, but 140 kg/ha K-Till Extra (15K) did not supply enough K to satisfy demand of the high yield potential.

This trial has highlighted the importance of maintaining K inputs (if required) when undertaking liming programs.

Ongoing responses to lime are likely to increase future demand for K because soil reserves will be depleted at an increasing rate.

Lead research organisation CSBP
Host research organisation West Midlands Group
Related program N/A

Burt's, Bolgart

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


Crop type Barley
Treatment type(s)
  • Fertiliser
Trial type Experimental
Trial design Replicated

Bolgart 2016

Sow rate or Target density 80kg/ha
Sow date 17 May 2016
Harvest date 29 November 2016
Plot size Not specified
Plot replication Not specified

12 Apr MoP

30 Jun 140 L/ha Flexi-N (basal)


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
Bolgart, WA Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Bolgart, 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 Bolgart WA
2016 208.4mm
2015 182.7mm
2014 175.5mm
2013 185.9mm
2012 165.0mm
2011 158.4mm
2010 152.2mm
2009 187.2mm
2008 189.4mm
2007 168.6mm
2006 202.4mm
2005 185.9mm
2004 181.1mm
2003 180.0mm
2002 150.7mm
2001 156.5mm
2000 226.1mm
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



Bolgart WA 2016

Observed climate information

Rainfall trial gsr (mm) 364mm

Derived climate information

Bolgart WA

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

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 last modified: 23-07-2019 14:51pm AEST