Durum agronomy – improving grass control in durum


Research organisatons
Funding source

Trial details

Researcher(s) Kenton Porker and Rob Wheeler (SARDI)
Year(s) 2012
Contributor Hart Field Site Group
Trial location(s) Site 5, Hart, SA
Durum agronomy – improving grass control in durum locations

To evaluate the relative weed competitiveness of barley, bread wheat, and durum against annual ryegrass grown under different management practices including seeding rate, nutrition, variety, and row spacing.

Key messages
  • Fathom barley was more competitive than Hindmarsh barley, bread wheat and durum
  • New durum variety Tjilkuri was no more competitive with ARG than older variety Tamaroi
  • Increasing seeding rate reduced ARG head density and increased grain yields in all durum varieties; low seeding rates led to large numbers of ryegrass heads
  • Narrower row spacing increased yield and reduced ARG head density in durum
  • Early applied N improved early vigour, and reduced ARG head densities, but led to yield penalties due to induced moisture stress
Lead research organisation South Australian Research and Development Institute
Host research organisation Hart Field Site Group
Trial funding source SAGIT
Related program N/A

Thanks to SAGIT for funding this research, SARDI Clare staff for trial management and the Hart Field-Site Group for provision of the land and extension of the work.

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


Crop types Wheat
Treatment type(s)
  • Crop
  • Crop: Type
  • Sowing
  • Sowing: Row spacing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Hart 2012 Wheat

Sow date 30 May 2012
Harvest date Not specified
Plot size 1.4m x 10m
Plot replication Not specified

DAP (18:20) + 2% Zn @ 70kg/ha

Post emergent nitrogen: 50kg N @ GS31

Hart 2012 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 Table 1

# Treatment 1
Plant density (plants/m2) Grain yield (t/ha)
1 200 sd/m2 Tamaroi (standard) 175.7 0.7
2 200 sd/m2 Tjikuri 163 0.63
3 100 sd/m2 Tamaroi 89.7 0.62
4 100 sd/m2 Tjikuri 87.9 0.66
5 300 sd/m2 Tamaroi 228.3 0.97
6 300 sd/m2 Tjikuri 237 0.96
7 Tamaroi (narrow rows) 155.4 0.78
8 Tjilkuri (narrow rows) 150.4 0.97
9 Tamaroi (early N) 147.7 0.42
10 Tjilkuri (early N) 152.6 0.45
11 Large seeded Tjilkuri 183.4 1.26
12 Fathom 154 3.28
13 Hindmarsh 139.9 2.85
14 Scout 176.8 1.53
15 UoA competitive Line 176.1 1.2

Grain yield t/ha


Plant density plants/m2

Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 5, Hart, SA Calcarosol
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 5, Hart, SA Chromosol
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



Site 5, Hart SA 2012

Observed climate information

Rainfall trial gsr (mm) 168mm

Derived climate information

Site 5, Hart SA


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: 06-08-2019 07:54am AEST