Field Research & Agronomy

AIM:

To testing and calibrate the extension of the valuable in-season nitrogen (N) calculator from wheat and barley to oats to help mid-season nitrogen decisions and maximise efficiency and returns.

For further details contact your local Area Manager or the Summit Research Team

CONCLUSION:

• The Barley Model In Season Nitrogen Calculator produces a reasonably accurate N recommendation to maximise yield and returns for both oaten grain and hay.
  
• The N-calculator rate optimised yield and gross margin for the 40N upfront treatments, whilst slightly under predicting for the 15N upfront treatments.
  
• 60kg/ha of N maximised yield and gross margin for the N rate treatments.
  
• 40kg/ha of N upfront topped up with the N-calculator rate of 16 kg N/ha 8WAS was the optimal treatment for yield and gross margin under these conditions.
  
• The N-calculator again proves to be an effective strategy for predicting N requirements in cereal crops.