A cropping systems simulator - investigating the impact of subsoil constraints


Research organisaton

Trial details

Researcher(s) Neal Dalgliesh (CSIRO)
Zvi Hochman (CSIRO)
Year(s) 2001
Contributor Birchip Cropping Group
Trial location(s) Watchupga East, VIC
A cropping systems simulator - investigating the impact of subsoil constraints locations

The aim of this investigation was to use the cropping systems simulator APSIM to assess the impact of high levels of sodicity chlorine, electrical conductivity and boron on the growth and yield of a wheat crop (cv. Yitpi) grown in the BCG Systems Trial.

Key messages

The simulation study suggests that the rate of root extension into the subsoil was dramatically slower in the presence of subsoil constraints. However, in the 2001 season, wheat yield was not limited by this factor, which reduced the use of soil moisture early in the season and thus delayed the onset of water stress during the dry grainfilling period.

Lead research organisation Birchip Cropping Group
Host research organisation N/A
Related program N/A
Acknowledgments N/A
Other trial partners Not specified
Download the trial report to view additional trial information


Crop type Cereal (Grain): Wheat
Treatment type(s)
  • Soil Improvement
  • Technology: Modelling
Trial type Experimental
Trial design Unknown

Watchupga East 2001

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication Not specified
Psuedoreplication Not specified
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
Watchupga East, VIC Not specified
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Watchupga East, VIC Calcarosol
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 Watchupga East VIC
2001 552.0mm
2000 524.7mm
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.

Watchupga East VIC

CAUTION: Trial site locality unknown; Climate data sourced from Birchip Cropping Group office location

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 report and links

2001 trial report