To compare the profitability between the RR and TT system as well as between OP and Hybrid varieties within these two systems.
There were no significant visual vigour or establishment differences between retained or pedigree ATR Cobbler. However, in previous seasons this has been observed in the paddock with some growers, as well as at other trial sites this year from the same seed that was used in this trial. This may be due to the unknown vigour of the seed under different broad-acre paddock situations.
CB Eclipse RR showed good vigour and growth initially from emergence until late flowering. From this stage, CB Eclipse RR finished flowering quite rapidly in comparison to the Hyola 404RR and 505RR, both which continued to flower strongly tak-ing advantage of the seasonal conditions. This correlates to past experiences with Hyola 404RR being an adaptable variety that will flower earlier or later depending on current seasonal conditions.
There was a distinct increase in plant vigour and biomass with the RR Hybrids compared to the RR open pollinated varieties, which is commonly observed in many trials across Australia. This improvement in vigour (along with adequate plant popula-tions) has a significant impact on the level of crop competition achieved which is critical for adequate weed control in the RR system. The vigour advantage in the Hybrid TT varieties was not apparent until late vegetative through to early flowering.
Lead research organisation
North East Farming Futures
Host research organisation
Trial funding source
Trial funding source
North East Farming Futures (NEFF)
Trial funding source
Yuna Farm Improvement Group
John Warr - supplying trial site and various required inputs
Darren Chitty Landmark R+D s - seeding and harvesting
Grant Thompson Crop Circle Consulting - spraying and harvesting
Justin Kudnig Pacific Seeds - reviewing this paper
No observed climate data available for this trial. Derived climate data is determined from trial site location and national weather sources.
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.
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