To assess the yields of a range of agronomic treatments on barley varieties at different sites.

• Highest grain yields were produced at the earlier sowing date at both sites.
• Commander produced the highest grain yields at both sites with the lowest protein content.
• Increased N application rates increased grain yield at both sites but significantly increased protein content at Frances.
• Increased sowing rates have been shown to slightly increase grain yield but reduce screenings and protein so may assist in attaining the malting grade.