Conclusion
All varieties responded to increasing density but started to plateau at approximately 20 plants/m2. Hyola 404RR had the flattest yield response meaning that its yields were less affected by lower plant densities. Hyola 404RR was the highest yielding variety and also produced highest gross margins. Ryegrass numbers were high at lower plant densities especially in open-pollinated varieties.
Acknowledgements
This trial (13GS20) is one of a series conducted throughout WA as part of the GRDC/DPIRD co-funded project 'Tactical break crop agronomy'.Thanks to Brent Hyde for hosting the trial and to the Katanning Research Support Unit for trial management.