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In Western Australia, competition from 7-90 capeweed plants per square metre in a wheat crop can reduce crop yield by 28-44% and net return by 25-76%.
Management of weeds, disease and nitrogen nutrition are ongoing challenges that limit yield potential.
Lupin seeding rates may need to be higher for pasture crops to achieve the same target density as standard crops, as lupin establishment density where crops were sown into perennial grasses was 8-3
Barley grass is a common name for Hordeum glaucum and H. leporinum.