Effect of lime incorporation on the residual value of phosphorus and potassium fertilizer

CC BY 4.0

Research organisatons
Funding source

Trial details

Researcher(s) Ross Brennan (DAFWA)
Gavin Sarre (DAFWA)
Criag Scanlan (DAFWA)
Year(s) 2015
Contributor West Midlands Group
Trial location(s) Badgingarra, WA
Effect of lime incorporation on the residual value of phosphorus and potassium fertilizer locations

To investigate the effect of a rotary spader and lime on the residual value of phosphorus and potassium fertilizer on a water repellent soil.

Key messages

Our results so far suggest that there is an important interaction between year (timing and distribution of rainfall) and soil and nutrient management. There were no significant treatment effects on grain yield in 2013 and 2015, but there were in 2014 and this may be related to autumn rainfall. At the end of March, 75 and 57 mm had fallen in 2013 and 2015 respectively (Figure 3), however, only 16 mm had fallen at this time in 2014. In 2014, soil water repellence as measured in a laboratory test was significantly higher in the no-till control treatments compared to the rotary spader treatments. Seedling density in 2014 was highest in treatments that had the highest soil water repellence, however, this effect did not carry through to grain yield which was lowest in the no-till control. This trial will continue for at least one more year.


Lead research organisation Department of Agriculture and Food WA
Host research organisation West Midlands Group
Trial funding source GRDC DAW00222
Related program N/A

Thanks to; Steve Cosh, Trevor Bell and Larry Prosser (DAFWA) for managing this experiment, Daron Malinowski (DAFWA) for assisting with field work and Dennis Martin for applying the rotary spader treatment.

This research is funded by DAFWA and the ‘More profit from crop nutrition’ initiative by GRDC (Project code DAW00222).

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


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

Badgingarra 2015

Sow rate or Target density 2013: 80 kg/ha on 23 May, 2014: 80 kg/ha on 14 May, 2015: 4 kg/ha on 6 May
Sowing machinery

DAFWA plot seeder (7 rows @ 22.5 cm row spacing) and harvester.

Sow date 13 June 2015
Harvest date Not specified
Plot size 20m x 1.54m
Plot replication 3
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
Badgingarra, WA Grey soil
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Badgingarra, WA Chromosol
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 Badgingarra WA
2015 160.0mm
2014 147.4mm
2013 180.2mm
2012 171.2mm
2011 167.7mm
2010 147.5mm
2009 176.1mm
2008 192.9mm
2007 135.2mm
2006 142.1mm
2005 169.7mm
2004 128.0mm
2003 144.9mm
2002 140.2mm
2001 128.6mm
2000 161.9mm
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



Badgingarra WA 2015

Observed climate information

Rainfall trial gsr (mm) 340mm

Derived climate information

Badgingarra WA


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 11:56am AEST