Researcher(s) |
Bill Davoren (CSIRO) Vadakattu Gupta (CSIRO) Stasia Kroker (CSIRO) Rick Llewellyn (CSIRO) Therese McBeath (CSIRO) |
---|---|
Year(s) | 2015 |
Contributor | Mallee Sustainable Farming Inc. |
Trial location(s) |
Loxton, SA
|
Related trials |
Trials in the Mallee have highlighted the benefits of strong early crop establishment and nutrition, particularly on sands. Non-wetting (or water repellent) sands have presented additional challenges. Global Positional System (GPS) guided seeding is increasingly common and presents the opportunity for strategic placement of seed in relation to last season’s crop rows. Trials have been established at Karoonda and Loxton to examine when and where on-row (or near-on-row) seeding may have benefits over inter-row seeding in stubble-retained systems.
Lead research organisation |
Commonwealth Scientific and Industrial Research Organisation |
---|---|
Host research organisation | N/A |
Trial funding source | GRDC MSF00003 |
Trial funding source | CSIRO |
Related program |
Maintaining profitable farming systems with retained stubble |
Acknowledgments |
Thanks to the Loller family and to Bulla Burra for their generous support in hosting the trials. Thanks to Robin Schaeffer, Matthew Whitney, Michael Moodie, Jeff Braun and Lou Flohr for discussions around trial design. Funding for this work was from the Stubble Retention initiative (Project MSF00003) and Agriculture, CSIRO. |
Other trial partners | Mallee Sustainable Farming |
Crop type | Cereal (Grain): Wheat |
---|---|
Treatment type(s) |
|
Trial type | Experimental |
Trial design | Replicated |
Sow date | 28 April 2015 |
---|---|
Harvest date | Not specified |
Plot size | Not specified |
Plot replication | Not specified |
Psuedoreplication | Not specified |
Fertiliser |
All plots received a pre-sowing application of 33 kg/ha of potassium sulfate to eliminate K and S deficiency as confounding issues and were sown into cereal stubble with DAP @ 50 kg/ha and Urea @ 24 kg/ha (20 kg N/ha, 10 kg P/ha). A trace element spray of Zn, Mn and Cu was also applied at early tillering. |
Herbicide |
Plots were sprayed with or without trifluralin @ 1.5 L/ha applied immediately prior to sowing |
Other trial notes |
In 2015 plots were sown at Karoonda and Loxton with wheat cv. Mace both on-row or inter-row at two sowing dates (April and May). At Karoonda the emphasis was on the effect of the sowing treatment on weed populations and crop performance on two contrasting soil types (a dune sand and a heavier clay loam swale). At Loxton the emphasis was on testing the effect of pre-emergent herbicide (trifluralin) on the response of crops to the position of the seed row in a sand. |
@T1: GS31 | @T2: GS65 | |||||
---|---|---|---|---|---|---|
# |
Treatment 1
|
Establishment plants (plants/m2) | Grain yield (t/ha) | Protein (%) | Biomass (t/ha) | Biomass (t/ha) |
1 | █ Plus trifluralin | 142 | 1.33 | 9.21 | 1.52 | 2.91 |
1 | █ Minus trifluralin | 162 | 1.3 | 9.23 | 1.59 | 2.89 |
1 | █ Inter-row | 158 | 1.34 | 9.12 | 1.63 | 2.89 |
2 | █ On-row | 146 | 1.3 | 9.32 | 1.48 | 2.91 |
2 | █ April sow | 154 | 1.48 | 8.96 | 1.48 | 3.05 |
2 | █ May sow | 150 | 1.16 | 9.49 | 1.62 | 2.75 |
3 | █ | |||||
3 | █ | |||||
3 | █ | |||||
4 | █ | |||||
4 | █ | |||||
4 | █ | |||||
5 | █ | |||||
5 | █ | |||||
5 | █ | |||||
6 | █ | |||||
6 | █ | |||||
6 | █ |
Rainfall trial gsr (mm) | 170mm |
---|
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.