Subsoil amelioration – results from year two


Research organisaton

Trial details

Researcher(s) Stuart Sherriff and Sam Trengove (Trengove Consulting)
Year(s) 2016
Contributor Hart Field Site Group
Trial location(s) , SA
Subsoil amelioration – results from year two locations

To investigate effects of soil amelioration methods on subsoil constraints and the benefits to grain yields in the Mid-North of SA.

Key messages
  • Grain yield at Hill River was increased on two soil types by 12% and 33% through the addition of soil amendments to the surface or subsoil.
  • There was no yield difference between applying amendment to the surface or subsoil in 2016, except at one of the seven sites sown to lentils.
  • There was little difference between applying large rates of synthetic fertiliser or applying 20 t/ha chicken litter.
Lead research organisation N/A
Host research organisation N/A
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
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Crop type Barley
Treatment type(s)
  • Soil
  • Soil amelioration
Trial type Experimental
Trial design Randomised,Replicated,Blocked


Sow date 12 May 2016
Harvest date Not specified
Plot size 2.5m x 10m
Plot replication Not specified
  • 60 kg/ha DAP IBS
  • 50 kg/ha post emergent urea
Other trial notes

While all due care has been taken in compiling the information within this manual the Hart Field-Site Group Inc or researchers involved take no liability resulting from the interpretation or use of these results. We do not endorse or recommend th

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Trial results Table 1

# Treatment 1
Screenings (%) Test weight (kg/hL) Grain yield (t/ha) NDVI (.) Protein (%)
1 Nil 3.2 65.6 4.85 0.86 12.1
2 Ripping only 4 63.9 4.99 0.86 13.4
3 20 t/ha chicken litter on surface 10.5 61.5 5.38 0.86 16.2
4 20 t/ha chicken litter on surface + ripping 11.4 60.9 5.37 0.87 17.1
5 20 t/ha chicken litter in subsoil + ripping 9.1 61.9 4.92 0.86 17.4
6 MAP, MoP, SoA, urea on surface 8.3 62.7 5.55 0.86 16.5
7 MAP, MoP, SoA, urea on surface + ripping 10.1 61.7 5.02 0.86 17
8 MAP, MoP, SoA, urea in subsoil + ripping 8.9 61.6 5.14 0.86 17.1

Grain yield t/ha




Protein %


Screenings %


Test weight kg/hL

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
, SA Grey clay
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
, 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.



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.

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Trial last modified: 11-06-2019 15:01pm AEST