Reassessing the value of phosphorous replacement strategies on fixing soils


Research organisatons
Funding source

Trial details

Researcher(s) Sean Mason and Glenn McDonald (University of Adelaide)
Year(s) 2015
Contributor Hart Field Site Group
Trial location(s) Site 2, Pinery, SA
Reassessing the value of phosphorous replacement strategies on fixing soils locations

To quantify the economic benefit to farmers of:

  • applying high application rates of phosphorus (P) on moderate buffering soils (phosphorus buffering index PBI) across a range of sites with different yield potentials, and
  • comparing three-four common wheat and barley varieties to assess their Phosphorus Use Efficiency (PUE).
Key messages
  • Economic gains can be made by applying higher than typical replacement P rates on soils with the ability to fix applications of P.
  • Highest gross margins are obtained by growing the most suitable variety for your region assuming P nutrition is corrected.
Lead research organisation School of Agriculture, Food and Wine - The University of Adelaide
Host research organisation N/A
Trial funding source SAGIT UA1201
Related program N/A

The authors thank SAGIT for the financial assistance that supports this research (project code UA1201).

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


Crop types Wheat
Treatment type(s)
  • Fertiliser
  • Fertiliser: Rate
  • Variety
  • Variety: Type
Trial type Experimental
Trial design Replicated

Pinery 2015 Wheat

Sow date 2 May 2015
Harvest date Not specified
Plot size 1.8m x 5.0m
Plot replication 4
  • P as MAP (10:22) @ 0, 5, 10, 20, 30 and 50 kg P/ha. Urea was used to balance N inputs so each treatment had an application of 22 kg N/ha applied at sowing.

Pinery 2015 Barley

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Fertiliser Not specified
Download the trial report to view additional method/treatment information

Download results

Trial results Wheat

# Variety
Grain yield (t/ha)
1 Cobra 2.99
2 Corrack 3.58
3 Mace 3.35
4 Trojan 2.81

Grain yield t/ha


Trial results Barley

# Variety
Grain yield (t/ha)
1 Commander 3.2
2 Compass 3.88
3 Fathom 3.68
4 La Trobe 3.95

Grain yield t/ha

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 2, Pinery, SA Not specified
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 2, Pinery, SA Calcarosol
National soil grid Source
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 2, Pinery SA


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 last modified: 09-12-2019 19:44pm AEST