Sorghum row spacing controls weed spread

February 7 2021 - 3:00pm
Effect of inter-row space on weed growth. Left: Weeds growing uninhibited in the inter-row space of sorghum sown at one metre row spacing. RIGHT: Fewer weeds can establish when the canopy closes in sorghum sown at 50 centimetre row spacing.
Effect of inter-row space on weed growth. Left: Weeds growing uninhibited in the inter-row space of sorghum sown at one metre row spacing. RIGHT: Fewer weeds can establish when the canopy closes in sorghum sown at 50 centimetre row spacing.

HALVING sorghum row spacing can halve weed seed production in both feathertop Rhodes grass and awnless barnyard grass, according to four years of research at Narrabri in New South Wales and Hermitage in Queensland.

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