Key Points
- Split nitrogen timings at GS30 & 32 tended to have the highest yield on both dryland & irrigated sites.
- Yields of dryland barley were more sensitive to N timings than irrigated barley.
- For both trials split N timings delayed until GS 32 & 39 had the lowest yields.
- Delaying the first N application from GS22 until GS30 or 32 reduced the number of tillers at GS32 by 11-35%, however there was no difference in head numbers at harvest.
- High rates of N at GS39 increased secondary tillers, screenings, protein and brackling.